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# Royal Spa: Custom Hot Tubs, Swim Spas, Baptistries and Float Tanks

## Sitemaps
[XML Sitemap](https://royalspa.com/sitemap_index.xml): Includes all crawlable and indexable pages.

## Posts
- [Portable, Built-In, or Custom: How to Choose a Church Baptistry](https://royalspa.com/church-baptistry-portable-built-in-custom/): Portable, built-in, or custom? The choice comes down to the power at the spot, your narrowest doorway, and how often you baptize. Verified specs and pricing from the Indiana manufacturer that builds all three.
- [Float Tank Installation at Home: What the Room Actually Needs](https://royalspa.com/float-tank-installation-home/): A home float tank needs 40 square feet, a hard level floor, a dedicated 220V circuit, and a humidity plan. Here are the real requirements from the Indiana manufacturer that builds them.
- [How Much Does a Swim Spa Cost? Real Prices from an Indiana Manufacturer](https://royalspa.com/how-much-does-a-swim-spa-cost/): A Royal Swim Spa costs $28,595, verified August 17, 2026. Here is what that covers, what installation actually involves, and how it compares to an inground pool you can only use four months a year.
- [How Much Does a Hot Tub Cost? Real Prices From the Manufacturer](https://royalspa.com/how-much-does-a-hot-tub-cost/): Real hot tub prices from the manufacturer: every model, every build, verified August 2026, plus the operating costs that matter more than the sticker.
- [Hot Tub Maintenance Schedule: The Year-Round Owner’s Calendar](https://royalspa.com/hot-tub-maintenance-annual-schedule/): Hot tub maintenance is a calendar, not a chore list: a three-minute weekly check, a five-minute monthly filter rinse, a quarterly water change, and one afternoon a year. Here's the whole schedule on one page.
- [Hot Tub Therapy for Arthritis: Pain Relief Through Heat](https://royalspa.com/hot-tub-arthritis-therapy/): If you live with arthritis, you know the constant calculation: medication versus lifestyle, immediate comfort versus long-term effects, what feels manageable today versus what you'll feel tomorrow. Hot water immersion isn't a fix. It's not a replacement for your doctor or your treatment plan. But many people with arthritis find that time in warm water makes daily life genuinely easier. That's worth understanding.
- [Royal Spa Hot Tub Models: How to Compare and Choose](https://royalspa.com/royal-spa-hot-tub-models-comparison/): Thirteen Royal Spa hot tub models, sorted by the three questions that actually decide the choice: how much space you have, how many people get in, and what you want the water working on. Full specs, builds, and starting prices.
- [Winter Hot Tub Entertainment: Host Gatherings in Cold Weather](https://royalspa.com/winter-hot-tub-entertaining/): Conventional wisdom says your hot tub is for summer relaxation. Conventional wisdom is wrong. Winter is actually the best time to own a hot tub. Not good. Best.
- [Contrast Therapy at Home: Building a Hot and Cold Routine in Your Backyard](https://royalspa.com/contrast-therapy-hot-tub-cold-plunge/): Contrast therapy stops being a spa-day splurge when both temperatures are steps from your back door. Here's how to build a hot and cold routine at home.
- [Hot Tub Energy Efficiency: The Real Cost of Running Your Spa](https://royalspa.com/hot-tub-energy-efficiency-operating-costs/): Your hot tub costs more to run over its lifetime than it costs to buy. Royal Spa engineered every component to keep operating costs as low as possible. Three builds. Same 40-year warranty. The math speaks for itself.
- [Hot Tub Filter Maintenance: The Complete Cleaning and Replacement Guide](https://royalspa.com/hot-tub-filter-cleaning-maintenance-guide/): Your hot tub filter does more work than anything else in your spa. Here is a complete guide to monthly cleaning, replacement timing, and why Royal Spa uses standard cartridges that keep maintenance simple and costs low.
- [Hot Tub Covers: Protection, Insulation, and Safety](https://royalspa.com/hot-tub-covers-protection-insulation/): Your hot tub spends most of its time uncovered. So people rarely think about the cover until it's falling apart or they realize they're wasting money on heating. That's a mistake. The right cover is the second most important component you'll buy for operating costs, wellness consistency, and safety.
- [How to Build a Home Wellness System: Hot Tub, Cold Plunge, and Float Tank](https://royalspa.com/home-wellness-system-hot-tub-cold-plunge-float-tank/): Heat, cold, and stillness: how a hot tub, cold plunge, and float tank work together as one home wellness system, and how to build yours in stages.
- [Hot Tub Energy Efficiency: Lower Your Bills Without Sacrificing Comfort](https://royalspa.com/hot-tub-energy-efficiency/): Most hot tub owners never look at their electric bill and run the math. They should. After the initial purchase, operating costs are where the real expense lives. Year after year. Decade after decade. The good news: smart engineering cuts those costs dramatically without forcing you to freeze.
- [Your First Float Tank Session: What to Expect](https://royalspa.com/float-tank-experience-first-time/): Your first float feels strange for about ten minutes, then it clicks. Here's how to prepare, what happens inside the tank, and the beginner mistakes worth skipping.
- [Hot Tub Filter Maintenance: Extend Equipment Life and Save Money](https://royalspa.com/hot-tub-filter-maintenance/): Your hot tub filter is the most underrated component in your whole system. Nobody gets excited about filter maintenance. But a $33 filter that lasts two years is the difference between a hot tub that costs you money and a hot tub that just works.
- [Qoolpod vs. a DIY Cold Plunge: What You’re Really Buying](https://royalspa.com/qoolpod-cold-plunge-comparison/): A DIY ice bath is cheap to start and a hassle to keep cold and clean. Here's an honest comparison of a purpose-built Qoolpod against the ice-and-freezer route, from temperature control to what it really costs to own.
- [Hot Tub Jet Selection: Choosing the Right Massage for You](https://royalspa.com/hot-tub-jet-selection-guide/): When you're shopping for a hot tub, people talk about jets. They say "54 jets" or "48 jets" like it's the main thing. It's not. What matters is what those jets do and whether they hit the places where you actually need the work.
- [Swim Spa Workouts: Build a Summer Fitness Routine at Home](https://royalspa.com/swim-spa-exercise-routine-summer/): A swim spa puts an adjustable current and a full workout in your backyard. Here are five ways to train in one, plus how to build a summer fitness routine that lasts all year.
- [Summer Hot Tub Water Care: Keeping Your System Clean in Peak Season](https://royalspa.com/summer-hot-tub-water-care/): Summer pushes your hot tub harder than any other season. More people using it. Hotter air temperatures. More sunlight. Your water chemistry has to work overtime. Here's how to keep your system clean and your water balanced when the heat is on.
- [Epsom Salt and Float Therapy: What Magnesium Really Does](https://royalspa.com/epsom-salt-float-therapy-magnesium/): A float tank is the most concentrated Epsom salt bath you can step into. Here is the honest take on magnesium, the mistake most people make at home, and why most spas cannot handle Epsom salt at all.
- [Fiberglass Hot Tubs vs. Acrylic: Which Lasts Longer?](https://royalspa.com/fiberglass-vs-acrylic-hot-tubs/): When you're shopping for a hot tub, the materials matter more than most salespeople admit. You'll hear about acrylic, fiberglass, and sometimes vinyl. Two materials dominate: acrylic (what most competitors use) and fiberglass (what Royal Spa builds). Understanding the difference isn't just technical. It's financial.
- [Hot Tub Jet Types: Matching Massage Therapy to What Aches](https://royalspa.com/hot-tub-jet-types-massage-therapy/): Jet count tells you almost nothing. Here's how to match hot tub jet types to the muscle that actually aches, and why pumps matter as much as jets.
- [Summer Hot Tub Maintenance: A Water Care Guide for Indiana Heat](https://royalspa.com/summer-hot-tub-maintenance-water-care/): Summer changes four things about your hot tub water at once: bather load, evaporation, UV degradation, and biofilm risk. Here's how to stay ahead of all of them.
- [Fiberglass vs. Acrylic Hot Tub Durability Comparison](https://royalspa.com/fiberglass-acrylic-hot-tub-durability-comparison/): You're comparing hot tubs. You've checked jet counts, seating layouts, maybe even prices. But there's a question most buyers don't think to ask until it's too late: what is this thing actually made of?
- [Hot Tub Temperature Guide: Finding Your Perfect Soak](https://royalspa.com/hot-tub-temperature-guide/): Your hot tub is only as good as the temperature you set it. Too hot and you'll overheat in 10 minutes. Too cool and you won't get the relaxation benefits. The right temperature depends on what you're trying to do.
- [7 Backyard Hot Tub Landscaping Ideas for Indiana Homes](https://royalspa.com/hot-tub-landscaping-ideas/): Your hot tub isn't just equipment. It's the centerpiece of your backyard. The right landscaping makes it feel intentional, private, and like a real destination instead of a plastic tub on your deck.
- [Hot Tub Entertaining: Party Ideas for Your Backyard](https://royalspa.com/hot-tub-entertaining-party-ideas/): You spent months picking the right hot tub. You got the water dialed in. You figured out your favorite temperature for a Tuesday night soak. But here's what most hot tub owners figure out by their first summer: the best nights aren't the solo ones. They're the nights when someone texts "what are you doing tonight?" and you say "come over."
- [Hot Tub Temperature Guide: Finding Your Perfect Soak](https://royalspa.com/hot-tub-temperature-settings-health/): There's a narrow sweet spot between a good soak and the best soak you've ever had. It's only four degrees wide. Most hot tub owners set their temperature to 104°F, forget about it, and never realize what they're missing.
- [7 Backyard Hot Tub Landscaping Ideas for Indiana Homes](https://royalspa.com/landscaping-ideas-indiana-hot-tub/): You bought the hot tub. Now what? It’s sitting on the patio, and the backyard still looks like it did before. The soak is great, but the setting could be better. A lot better.
- [How Mineral-Enhanced Water Care Reduces Hot Tub Chemicals](https://royalspa.com/mineral-water-care-hot-tub-chemicals/): A mineral water care system isn’t set-and-forget. You still check your water. You still clean your filter. You still pay attention.
- [Spring Hot Tub Opening: Complete Startup Checklist for Indiana Homeowners](https://royalspa.com/spring-hot-tub-opening-guide/): Spring in Indiana means one thing for hot tub owners: it’s time to get your spa ready for the warm months ahead. Whether you winterized last fall or kept your tub running through February’s cold snaps, a proper spring startup protects your equipment and gets your water right from day one.
- [Can You Put Epsom Salt in a Royal Spa Hot Tub? YES!](https://royalspa.com/epsom-salt-hot-tubs/): Are you looking to elevate your relaxation experience to new heights? Look no further than Royal Spa hot tubs and epsom salt! At Royal Spa,
- [Using Your Hot Tub in Winter: Temperature, Tips, and What to Know](https://royalspa.com/hot-tub-in-winter/): You may be wondering “what temperature should I keep my hot tub at in the winter?” That’s a great question, and it doesn’t have to be very complicated.
- [Float Therapy Benefits: Why More People Are Floating](https://royalspa.com/float-therapy-benefits/): Whether it’s recovering from physical ailments, soreness and fatigue, or recovering from mental strain, stress, or anxiety, floating for just 60 minutes can have a dramatic effect on all.
- [Starting a Float Center – Things to Think About](https://royalspa.com/starting-a-float-center/): Are you thinking about opening your own float center or spa? Or maybe you're thinking about adding float therapy to an existing business.
- [Hot Tub Exercises: 9 Easy Workouts You Can Do in Your Spa](https://royalspa.com/hot-tub-exercises/): Royal Spa Hot Tubs not only offer an oasis for relaxation, but they are also great for exercise!
- [Is a Salt Water Hot Tub Better?](https://royalspa.com/salt-water-hot-tub-better/): Are you wondering if a salt water hot tub is better for you? Salt has detrimental impacts on hot tubs not designed specifically for use
- [Royal Spa Now Offers Covana Hot Tub Covers](https://royalspa.com/covana-hot-tub-covers/): Do you struggle with the cover on your hot tub every time you want to soak? What if we told you there was a way to open and close the cover with the simple turn of a key? Remove the hassle of opening/closing and removing any snow, ice, or other debris with Covana Hot Tub covers!
- [How Often Should I Change the Water in My Hot Tub?](https://royalspa.com/often-change-water-hot-tub/): Change your hot tub water only as needed. This is what we tell people when they ask "How often should I change the water in
- [Why Buy A Hybrid Hot Tub?](https://royalspa.com/buy-hybrid-hot-tub/): Royal Spa’s line of hybrid hot tubs combines state-of-the-art technology and the latest innovations with more than 30 years of industry expertise. The result is
- [Can I Clean My Hot Tub with Vinegar?](https://royalspa.com/can-clean-hot-tub-vinegar/): You can use vinegar or any acetic acid to clean your hot tub, but we recommend our pH Down for best results. Vinegar is an
- [7 Tips to Help You Throw the Perfect Hot Tub Party](https://royalspa.com/7-tips-help-throw-perfect-hot-tub-party/): One of the best ways to enjoy your hot tub with friends and family is to host a hot tub party and we have 7 tips to help you throw the perfect one!
- [Health Benefits of a Hot Tub](https://royalspa.com/health-benefits-of-a-hot-tub/): Did you know there are several health benefits of a hot tub? From reducing stress to rejuvenating skin and hair, your Royal Spa can do it all!
- [Hot Tub Cleaning Tips](https://royalspa.com/how-do-i-clean-my-hot-tub/): Your Royal Spa is a sanctuary where you go to relax and get away from it all. You can’t do that if it’s dirty or functioning poorly. That’s why we’ve put together this hot tub cleaning guide.
- [Are Hot Tubs A Lot Of Work?](https://royalspa.com/are-hot-tubs-a-lot-of-work/): When you look at a competitor's hot tub or one that was made years ago, they were designed to require 12 hours of maintenance, $230 worth of chemicals, and filters that cost as much as $175 per year
- [How Much Does It Cost To Run A Hot Tub?](https://royalspa.com/costs-of-running-a-hot-tub/): People say that hot tubs can be very expensive to own. And that is absolutely true! If you get a commercially manufactured hot tub, sometimes they run continuously with a 2-speed pump. The low speed of the 2-speed pump draws 850 watts. At 850 watts at 10 cents a kilowatt hour, which typically what electricity costs around the United States, you would pay $767 dollars a year just to circulate the tub. That seems like too much!
- [7 Ways to Enjoy Your Hot Tub in Autumn](https://royalspa.com/7-ways-to-enjoy-your-hot-tub-in-autumn/): Autumn is a wonderful time of year! The air is crisp and the trees turn a hundred shades of gold, orange, and red. Do you know what makes autumn even more enjoyable? A Royal Spa hot tub!
- [How to Fix Cloudy Hot Tub Water](https://royalspa.com/cloudy-hot-tub-water/): When you purchase a hot tub, you’re going to fill it with standard well or city water, which is packed full of minerals and nutrients. At first these minerals and nutrients are so small that you can’t see them, but after 10 days or so they will start to form larger compounds, which often make the water cloudy.
- [Reasons To Use a Portable Baptistry](https://royalspa.com/reasons-to-use-a-portable-baptistry/): A portable baptistry is a unique solution for situations where a traditional or permanent baptismal one is not appropriate. Wondering if a portable baptistry is a good fit for your congregation?

## Pages
- [Request a Quote](https://royalspa.com/request-a-quote/): Prices, utilities, installation costs and ongoing promotions vary by location.
- [Wishlist](https://royalspa.com/wishlist/)
- [Request a Baptistry Quote](https://royalspa.com/baptistry-quote/): Designed and manufactured by Royal Spa, our baptistries focus on thoughtful engineering and manufacturing excellence to meet the needs voiced by many pastors across the country.
- [Request a Float Tank Quote](https://royalspa.com/float-tank-quote/): Prices, utilities, installation costs and ongoing promotions vary by location. For a personalized quote, please complete the form below.
- [Blog](https://royalspa.com/blog/): Royal Spa2026-08-31T04:17:30-04:00
- [Downloadable Resources](https://royalspa.com/downloads/): BrochuresManualsMiscellaneous
- [Hot Tub Covers](https://royalspa.com/covers/): Helps to maintain clean water, particularly if the spa is located outside
- [Float Tank Owner’s Guide](https://royalspa.com/float-tank-owners-guide/): With benefits that last
- [7 Reasons to Buy a Hot Tub from Royal Spa](https://royalspa.com/reasons-to-buy-a-hot-tub-from-royal-spa/): We are Royal Spa, engineers of the BEST hot tubs on the market. Here are 7 reasons to purchase a hot tub from Royal Spa.
- [About Us](https://royalspa.com/about-us/): Royal Spa is an internationally-recognized leading manufacturer of durable, energy-efficient hot tubs, swim spas, float tanks, baptistries and, more in North America.
- [Shop](https://royalspa.com/shop/): Inquire and obtain finance in advance!
- [Order Tracking](https://royalspa.com/order-tracking/): To track your order please enter your Order ID in the box below and press the "Track" button. This was given to you on your receipt and in the confirmation email you should have received.
- [Home](https://royalspa.com/): Whether entertaining the kids or training for your next Ironman, a Royal Spa Swim Spa provides the perfect swimming pool alternative.
- [Special Offers](https://royalspa.com/special-offers/): Clearance and special items are limited in quantity and may sell out quickly. Promotional images may not match current stock. Availability is not guaranteed, as items can become unavailable at any time. All sales are final and on an "as is" basis. No rain checks or substitutions will be made for sold-out items.
- [Royal Spa Return Policy](https://royalspa.com/returns/): At Royal Spa, we aim to ensure your satisfaction. Due to the nature of our products, our return policy varies by item type. Please review the details below.
- [Trade In Your Hot Tub](https://royalspa.com/tradein/): We'll take your old hot tub and give you top value toward a new Royal Spa.
- [Become A Dealer](https://royalspa.com/become-dealer/): Royal Spa hot tubs and spas are a high-end luxury product. We're looking for dealers and representatives to represent our brand well.
- [Parts and Accessories](https://royalspa.com/parts-and-accessories/): We have a large assortment of chemicals, parts and accessories for your spa. Please call if you don't see what you are looking for. We will be more than happy to assist you.
- [Search](https://royalspa.com/search/): Looking for something in particular? Search the site here:
- [Royal Spa Reviews](https://royalspa.com/reviews/): Experience for yourself how you can make meaningful relaxation and recovery simple, easy, and affordable.
- [The Royal Spa Difference](https://royalspa.com/royal-spa-difference/): People will often ask “what makes Royal Spa better than any competitor? We are engineers. We design and build spas. We are not dealers that are encouraged to profit from customers by needless service calls and unnecessary chemicals. Our spas are engineered specifically to last longer and save you more time and money through the years you are enjoying your royal spa.
- [Contact Us](https://royalspa.com/contact-us/): Fill out the form below to have a representative contact you within 24-48 business hours.
- [Our Locations](https://royalspa.com/our-locations/): Georgia
- [Parts & Service](https://royalspa.com/parts-service/): Closed Sunday
- [Royal Spa Pendleton Pike](https://royalspa.com/our-locations/pendleton-pike/): Our showroom on Indianapolis’ north east side is just west of the intersection of Pendleton Pike and Mitthoeffer Road, on the north side of the street.
- [Royal Spa Headquarters](https://royalspa.com/our-locations/epler/): The Royal Spa Factory Showroom and headquarters is located on IN 37, just a few minutes south of I465. You’ll see us at the Southwest corner of the Epler Ave and 37 intersection.
- [Royal Spa Avon](https://royalspa.com/our-locations/avon/): Our showroom in Avon is located just 10 minutes west of Indianapolis, at the intersection of Dan Jones Road and Highway 36 across from the Lowe’s.
- [Sitemap](https://royalspa.com/sitemap/)
- [Terms and Conditions](https://royalspa.com/terms-and-conditions/): Royal Spa (“https://royalspa.com”) owns and operate this Website. This document governs your relationship with https://royalspa.com (“Website”). Access to and use of this Website and the products and services available through this Website (collectively, the "Services") are subject to the following terms, conditions and notices (the "Terms of Service"). By using the Services, you are agreeing to all of the Terms of Service, as may be updated by us from time to time. You should check this page regularly to take notice of any changes we may have made to the Terms of Service.

## Products
- [PLPRB35-IN-3 FILTER REPLT 35 SQ FT PRB35-IN](https://royalspa.com/parts/filters/filter-replacement-35-sq-ft-prb35-in/): Pleatco 35 sq ft filter for Waterway, Rainbow, and ThermoSpa systems. 5" x 9-1/4". Replaces Unicel C-4335, Filbur FC-2385.
- [PSR35-4 Filter Cartridge](https://royalspa.com/parts/filters/filter-cartridge-3/): Pleatco 35 sq ft filter for Sta-Rite Posi-Flo systems. 8-11/16" x 9-3/4". Fits 35GPM-TX, TX35, 35TXR.
- [PSR50 Filter Cartridge](https://royalspa.com/parts/filters/filter-cartridge-2/): Pleatco 50 sq ft filter for Sta-Rite Posi-Flo systems. 8-11/16" x 13-5/16". Replaces Unicel UHD-SR50, Filbur FC-2530.
- [Hydromatic replaces filter FC-2710 (5X16)](https://royalspa.com/parts/filters/hydromatic-replaces-filbur-fc-2710-5x16/): Filbur/Hydromatic 40 sq ft filter for Sundance spas. 4-5/8" x 16-3/4". Replaces Unicel C-4440, Pleatco PSD40.
- [FC-2397 Spa Filter Cartridge](https://royalspa.com/parts/filters/spa-filter-cartridge-3/): Filbur 100 sq ft filter for Rainbow/Pentair Dynamic 100 and RTL-100 systems. 4-15/16" x 26-11/16". Replaces Unicel C-4999, Pleatco PRB100.
- [PCAL100 Spa Replacement Cartridge (5 x 25)](https://royalspa.com/parts/filters/spa-replacement-cartridge-5x25/): Pleatco 100 sq ft filter for Waterway, Cal Spas, Coast Spas, Thermo Spas. 4-15/16" x 23-5/8". Replaces Unicel C-4995, Filbur FC-2940.
- [FC-3072 Filbur Filter (5 x 25)](https://royalspa.com/parts/filters/filter-5x25-2/): Filbur 50 sq ft filter for Discovery and Grecian spas. 4-5/8" x 23-3/4". Replaces Unicel C-4350, Pleatco PRB50-IN.
- [PCAL75 Pool Replacement Filter for Pleatco (5 x 25)](https://royalspa.com/parts/filters/pool-replacement-filter-5x25/): Pleatco 75 sq ft filter for Waterway, Cal Spas, and Coast Spas. 5" x 23-5/8". Replaces Unicel C-4970, Filbur FC-2971.
- [PLF100A Pool Replacement Filter (26X20X6)](https://royalspa.com/parts/filters/pool-replacement-filter-2-pack-26x20x6/): Pleatco 100 sq ft pool filter for Pentair CC100/CCRP100 systems. 10-1/16" x 23-5/8". Replaces Unicel C-9410, Filbur FC-1290.
- [Essentials 5030 Filter Cartridge Marquis 35 Square Feet](https://royalspa.com/parts/filters/essentials-filter-cartridge-marquis-35-sq-ft/): Essentials 35 sq ft filter for Marquis spas. 5-1/4" x 12-13/16". Replaces Filbur FC-0195, Unicel 5CH-352.
- [FC-1008 Filbur Replacement Filter Cartridge](https://royalspa.com/parts/filters/replacement-filter-cartridge/): Filbur 20 sq ft filter for Master Spa Eco-Pure systems (2007-2008). 7-7/8" x 6-5/8". Antimicrobial enhanced media.
- [FC-2971 Pool Replacement Filter](https://royalspa.com/parts/filters/pool-replacement-filter/): Filbur 75 sq ft filter for Waterway and Cal Spas. 5-5/16" x 14-11/16". Replaces Unicel C-5374, Pleatco PLBS75.
- [FC-3027 Spa Filter](https://royalspa.com/parts/filters/spa-filter/): Filbur 5 sq ft mini filter for Icon, Weslo, and Image spas. 2-11/16" x 6". Replaces Unicel C-2304, Pleatco PD-12.
- [Hydromatic filter replaces Filbur FC-2730 Filter (5X15X5)](https://royalspa.com/parts/filters/hydromatic-filter-replaces-filbur-fc-2730-5x15x5/): Filbur/Hydromatic 65 sq ft filter for Sundance spas. 7-1/2" x 14-3/4". Replaces Unicel C-7465, Pleatco PSD95.
- [PLF4CH-949 Spa Replacement Cartridge](https://royalspa.com/parts/filters/spa-replacement-cartridge-5/): Pleatco 50 sq ft filter for Waterway Teleweir 50, Rising Dragon, Cal Spa. 5" x 13-1/16". Replaces Unicel 4CH-949, Filbur FC-0172.
- [6CH-960 Proline Hot Tub Spa Filter](https://royalspa.com/parts/filters/hot-tub-spa-filter-2/): ProLine 52 sq ft filter for Jacuzzi Premium and Sundance spas. 6-3/4" x 15-1/2". Handle top, 2" male thread bottom.
- [PLPWW35L FILTER, REPLMT NORDIC 4CH935](https://royalspa.com/parts/filters/filter-replaces-nordic-4ch935/): Pleatco 35 sq ft filter for Nordic hot tubs. 5" x 8.5". Replaces Unicel 4CH-935, Filbur FC-0170. Handle top, 1.5" MPT bottom.
- [P-8465 ProLine Spa Filter Cartridge](https://royalspa.com/parts/filters/spa-filter-cartridge-2/): ProLine 65 sq ft filter for Watkins/Tiger River spas. 8-1/2" x 10-1/2". Replaces Unicel C-8465, Filbur FC-3960, Pleatco PWK65.
- [FC-0171 Filbur Filter (5 x 25)](https://royalspa.com/parts/filters/filter-5x25/): Filbur spa filter cartridge, 5" x 25" dimensions. Reemay polyester media with antimicrobial treatment. Confirm your current filter dimensions before ordering.
- [FC-0151 Filbur Hot Tub Spa Filter](https://royalspa.com/parts/filters/hot-tub-spa-filter/): Filbur 50 sq ft filter for Dimension One and Dynasty spas. 4-5/8" x 14-3/4". Replaces Unicel 4CH-50, Pleatco PGS25P4.
- [8578 CALDERA 50 SF Spa Replacement Cartridge for Caldera](https://royalspa.com/parts/filters/caldera-50-sf-spa-replacement-cartridge/): Caldera 50 sq ft spa filter. 7" x 10-3/4". OEM part X135595. Replaces Unicel C-7350, Pleatco PCD50N, Filbur FC-3963.
- [78161 Spa Replacement Cartridge for Watkins](https://royalspa.com/parts/filters/spa-replacement-cartridge-4/): OEM Watkins filter for Hot Spring Limelight spas (2018+). 6-3/8" x 14", 50 sq ft. Fits Pulse, Flair, Flash, Glow, Gleam, Beam.
- [PJ25-4 Pleatco Advanced Spa Pool / Spa Replacement Filter Cartridge](https://royalspa.com/parts/filters/advanced-spa-pool-spa-replacement-filter/): Pleatco 25 sq ft filter for Jacuzzi CF 25 systems. 7-1/16" x 11-7/8". Replaces Unicel C-6625, Filbur FC-1426.
- [0969601 Hot Spring Spas Tri-X Filter Cartridge](https://royalspa.com/parts/filters/tri-x-filter-cartridge/): Hot Spring Tri-X ceramic filter. 6" x 10-1/4", 65 sq ft equivalent. Dishwasher safe, lasts up to 5 years. Exclusive to Hot Spring/Watkins spas.
- [P7CH-552 Proline Filter Cartridge](https://royalspa.com/parts/filters/filter-cartridge/): ProLine spa filter cartridge P7CH-552. Replacement for select spa systems. Contact us for compatibility confirmation.
- [PCD50N Spa Replacement Cartridge for Pleatco](https://royalspa.com/parts/filters/spa-replacement-cartridge-3/): Pleatco 50 sq ft filter for Caldera spas (new style). 7" x 10-3/4". Replaces Unicel C-7350, Filbur FC-3963.
- [PJW40SC-F2M Spa Replacement Cartridge for Pleatco](https://royalspa.com/parts/filters/spa-replacement-cartridge-2/): Pleatco 40 sq ft filter for Jacuzzi and Sundance spas. 5-3/16" x 10-3/4". Replaces Unicel 5CH-402, Filbur FC-2811.
- [PVT25N-P4 Pleatco Filter Cartridge Replaces FC-0186](https://royalspa.com/parts/filters/filter-cartridge-replaces-fc-0186/): Pleatco replacement for Vita Spa filters. 4-3/8" x 7-5/8", 25 sq ft. Direct replacement for Filbur FC-0186, Unicel C-4405.
- [P4CH-21 ProLine Spa Filter Cartridge](https://royalspa.com/parts/filters/spa-filter-cartridge/): ProLine spa filter cartridge. 4-5/8" x 8", 19 sq ft. Cone handle top, 1.5" MPT bottom. Compact replacement for smaller spa systems.
- [FC-3078 Filbur Filter](https://royalspa.com/parts/filters/filter/): Filbur spa filter for Discovery and Grecian spas. 4-15/16" x 10-3/8", 30 sq ft. Replaces Unicel C-4405, Pleatco PRB25-TC.
- [31489 Spa Replacement Cartridge for Hot Spring](https://royalspa.com/parts/filters/spa-replacement-cartridge-for-hot-spring/): Replacement filter for Hot Spring and Watkins spas. 5-7/8" x 10-1/2", 30 sq ft. Cross-refs Unicel C-6430, Pleatco PWK30-4, Filbur FC-3915.
- [FC-2387 Filbur Spa Filter Twin-Pack](https://royalspa.com/parts/filters/spa-filter-twin-pack/): Filbur twin-pack spa filter for Rainbow DSF 50 systems. 4-15/16" x 6-5/8", 25 sq ft each (50 total). Replaces Unicel C-4401, Pleatco PRB25SF-PAIR.
- [PFF25TC-P4 Spa Replacement Cartridge for Pleatco](https://royalspa.com/parts/filters/spa-replacement-cartridge/): Pleatco replacement cartridge for Freeflow Spas. 4-15/16" x 6-5/8", 25 sq ft. Replaces Unicel 4CH-23, Filbur FC-2400. Fits Freeflow Lagas, TLX, RLX and Hayward FF-100.
- [IonPure Copper Ionizer](https://royalspa.com/parts/ionpure/): Copper Ionization for Hot Tubs IonPure™ is Royal Spa's copper ionizer for hot tubs and spas — a standalone water treatment component that dramatically reduces the chlorine and bromine your spa needs to stay fresh between soaks. Developed i partnership with Intech High-purity copper electrodes release mineral ions continuously as water circulates, providing persistent mineral-level support that chemical-only systems can't replicate. The result is noticeably softer, gentler water with less maintenance, less odor, and fewer of the harsh byproducts that leave skin dry and eyes irritated. IonPure™ can be added to most existing Royal Spas or included with a new build — but compatibility varies, so talk to a Royal Spa specialist before ordering. Persistent mineral protection between soaks — copper ions stay active in warm water where chlorine breaks down fast, so your spa stays cleaner without constant re-dosing Dramatically reduced chemical maintenance — hot tub ionization cuts chloramine formation, the primary cause of dry skin, eye irritation, and that chemical smell most owners accept as unavoidable Simple owner installation — plumbs into your spa's return line; may involve trimming or coupling depending on your system; a Royal Spa specialist can confirm fit before you buy Not compatible with all hot tub systems. Contact Royal Spa to confirm compatibility with your spa before purchasing.
- [Qoolpod Air](https://royalspa.com/cold-plunge/qoolpod-air/): The Qoolpod Air with Chiller is a portable, durable cold plunge system designed to elevate your recovery and wellness routine. Made from military-grade drop-stitch material, it provides a solid and stable structure when inflated, while the powerful 1 HP chiller ensures precise temperature control from 37°F to 104°F for cold or warm therapy. Equipped with ozone sanitation, 24/7 filtration, and Wi-Fi connectivity for remote control, it’s easy to maintain and customize. Complete with an insulated cover, ground cover, air pump, and a convenient backpack for transport, the Qoolpod Air combines advanced functionality with portability for the ultimate recovery experience.
- [Portable Baptistry](https://royalspa.com/baptistries/portable-baptistry/): Imagine the moment: the water is warm, the air is filled with anticipation, and your congregation is gathered to witness a sacred rite. With the Royal Spa® Portable Baptistry, this vision becomes reality, effortlessly transforming any location into a consecrated space. This portable marvel combines heated comfort, quick setup, and robust durability, ensuring that your focus remains on the spiritual journey rather than the logistics. Proudly made in the USA and trusted by over 1,700 congregations, it’s the baptistry that pastors rely on for ceremonies that matter. The Portable Baptistry includes Ozone Purification System Easy to Move and Maneuver Quick Fill & Drain Energy Efficient and Durable Select features and get a quote.
- [Princess](https://royalspa.com/hot-tubs/princess/): The Princess is built for one thing: your escape. The plush lounger cradles you from head to toe while palm jets work tired hands and the signature storm jet targets mid-back tension. At 175 gallons, it heats fast and costs less to run, making daily use actually practical. Perfect for the person who knows their hot tub time isn’t about entertaining—it’s about recovery.
- [Majesty](https://royalspa.com/hot-tubs/majesty/): The Majesty seats 5 people with plenty of space. At 465 gallons in a 94×94 cabinet—the same footprint as Royal Spa’s largest models—you’re not bumping elbows or fighting for legroom. Deep therapy chairs with ergonomic contouring accommodate taller frames and broader shoulders. Configure up to 45 jets to target exactly where your body needs relief most.
- [Monarch](https://royalspa.com/hot-tubs/monarch/): The Monarch seats eight—more than any other Royal Spa. Blending Classic Design with modern durability and longevity, it’s octagonal shape creates natural conversation zones where everyone faces each other. Free-form seating means no assigned spots; people move around, mingle, and actually interact instead of sitting in fixed positions staring at phones.
- [Crown](https://royalspa.com/hot-tubs/crown/): The Crown takes a different approach: barrier-free seating across four positions that let you sit where you want, how you want. No assigned loungers, no forcing yourself into someone else’s idea of comfort. The open layout makes conversation natural, and 15 jets provide gentle hydrotherapy for people who want warm water and relaxation without an intense massage.
- [Knight](https://royalspa.com/hot-tubs/knight/): The Knight fits where other hot tubs can’t—through standard doorways, onto small decks, into rooms that weren’t designed for spas. Its elongated 72 x 88 shape creates surprising comfort for up to five people who want to stretch out, not curl up. The full-length lounger delivers head-to-toe coverage, and the compact footprint means you don’t need to sacrifice your entire backyard.
- [Royale](https://royalspa.com/hot-tubs/royale/): The Royale turns your backyard into the place you actually decompress. Sink into the full-body lounger after a long day, or let the deep bucket seat’s palm jets work on hands and wrists tired from keyboards and steering wheels. Up to 55 jets deliver serious hydrotherapy and when others join you, there’s room: seating for five includes a built-in “cool down” spot where kids can hang out without overheating.
- [Emperor II](https://royalspa.com/hot-tubs/emperor-ii/): The Emperor II is designed for full-body immersion for people who want to actually sink in. Two loungers let you stretch out completely while the 11-jet “Hot Seat” targets shoulders, palms, and feet simultaneously. Side-by-side seating accommodates different heights, and a booster seat keeps kids at conversation level without floating away.
- [Sultan](https://royalspa.com/hot-tubs/sultan/): The Sultan turns your backyard into the space where you actually unwind—and where others want to join you. Customized jets target shoulders, back, and feet across seven varied seats, so everyone from your tallest guest to the kids on the cool-down seat finds their spot. Royal Spa’s most popular model earns its reputation: serious hydrotherapy in a size that handles a crowd without sacrificing comfort for anyone.
- [Regal](https://royalspa.com/hot-tubs/regal/): The Regal attacks the tension pattern most people don’t realize they have—neck, shoulders, upper back. The specialized neck and shoulder massage system in the bucket seat targets what hours at a desk or behind a wheel leave behind. Dual loungers handle everything from head to toe, and the “Cool Down” seat gives you a break without leaving the water.
- [Jewel](https://royalspa.com/hot-tubs/jewel/): The Jewel’s cut-corner design solves a problem most hot tub shoppers don’t think about until delivery day: where exactly does this thing go? The angled shape tucks into deck corners and patio shapes that would waste space with a traditional square tub. Up to 38 jets across five seats deliver genuine hydrotherapy, and the bucket seat’s arm support and palm jets target the tension that collects in hands and wrists. A mid-size footprint with serious therapeutic capability.
- [Empress](https://royalspa.com/hot-tubs/empress/): The Empress earns its reputation as royalty. Two non-float loungers anchor you in place—no drifting, no fighting buoyancy—while the 12-jet “Hot Seat” works palms, wrists, and pressure points that typical hot tubs ignore. Every seat includes its own foot massage station, making this the go-to for people whose calves and feet take daily punishment.
- [Royalty II](https://royalspa.com/hot-tubs/royalty-ii/): The Royalty II goes after the tension most people carry—neck, shoulders, and feet. One seat features the exclusive shoulder and neck massage system that desk workers and drivers actually need, while the “Soul-mate” reflexology footwell targets pressure points your regular massage therapist would charge extra for. Up to 42 jets across six seats deliver serious hydrotherapy in a mid-size frame that fits where larger models can’t.
- [Personal Float Tank](https://royalspa.com/float-tanks/personal-float-tank/): Enjoy all the benefits of floatation therapy in your own home with the economical Royal Spa personal float tank. Made at our manufacturing facility in Indianapolis, Indiana, this float tank is durable and long-lasting. It uses an ozone purification system. Simple to clean, it almost takes care of itself.  A seamless fiberglass construction means you won’t worry about leaks. An energy efficient pump insures minimal impact to your electric bill. Select features and get a quote.
- [King Ultra](https://royalspa.com/hot-tubs/king-ultra/): Your body works hard. The King Ultra works harder. With extra-deep, extra-wide seating for up to 6, this flagship hot tub delivers targeted hydrotherapy through up to 60 jets and air injectors. Built for those who need real recovery—not just relaxation—it’s Royal Spa’s most powerful configuration, standard. Four-pump system delivers maximum pressure — every jet, every seat, every session performs at full power Configurations developed with medical input — strategic jet placement targets where your body needs it most Fully loaded from the factory — Medical Package, Bio-Lok® protection, ozone purification, thermal cover, and more included

## Product categories
- [Filters](https://royalspa.com/parts/filters/)
- [Cold Plunge](https://royalspa.com/cold-plunge/)
- [Hot Tubs](https://royalspa.com/hot-tubs/)
- [Swim Spas](https://royalspa.com/swim-spas/)
- [Float Tanks](https://royalspa.com/float-tanks/)
- [Baptistries](https://royalspa.com/baptistries/)
- [Parts](https://royalspa.com/parts/)
- [Chemicals](https://royalspa.com/chemicals/)
- [Accessories](https://royalspa.com/accessories/)

## Categories
- [Church Baptistries](https://royalspa.com/baptistry-articles/)
- [Entertainment](https://royalspa.com/articles/entertainment/)
- [Float Tank Articles](https://royalspa.com/float-tank-articles/)
- [Frequently Asked Questions](https://royalspa.com/articles/faq/)
- [Health and Fitness](https://royalspa.com/articles/health-and-fitness/)
- [Hot Tub Articles](https://royalspa.com/hot-tub-articles/)
- [Maintenance](https://royalspa.com/articles/maintenance/)
- [Swim Spa Articles](https://royalspa.com/swim-spa-articles/)