
Water Care & Chemicals
Top-Rated Hot Tub Chemicals & Water Care Solutions | Fast Shipping at Hot Tub Things

Hot Tub Things Filters
Upgrade your spa with premium hot tub filters from Hot Tub Things.

Accessories & Spa Essentials
Elevate relaxation and convenience with premium hot tub accessories & spa essentials. Shop the best add-ons for comfort, style, and crystal-clear water, all in one place.

Ultimate Comfort Hot Tub Pillows
Soft, durable, and perfectly contoured hot tub pillows crafted to deliver ultimate relaxation and spa enjoyment.
Shop Our Best Sellers
Shop the top hot tub essentials trusted for comfort and water care—your shortcut to a premium spa experience.
Frog® @ease® SmartChlor® Cartridge 3‑Pack – Bullfrog® Spas Classic – part #10‑01053
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Bullfrog® Wellspring 282 Coreless Filter 2‑Pack (A, R & X Series, 2018+) – part #10‑00416
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Hot Tub Things® Oxidizing Spa Shock – Chlorine-Free Oxygen Cleaner (1 lb / 2.2 lb / 5 lb)
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Hot Tub Things® 282 Microban® Filter 2‑Pack – Replaces Bullfrog® 10‑00282 – for A/R/X Series (2018+) – part #HTT‑10‑00416
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Filters, Adapters & Cartridges
Hot Tub Chemicals | Spa Care Products - Hot Tub Things™
Hot Tub Things® Oxidizing Spa Shock – Chlorine-Free Oxygen Cleaner (1 lb / 2.2 lb / 5 lb)
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Hot Tub Things® Chlorinating Granules – Spa & Hot Tub Sanitizer (1 lb / 2 lb / 5 lb)
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Hot Tub Things® pH & Alkalinity Up – Spa Water Balancer (1 lb & 2 lb)
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Hot Tub Things® Spa Clarifier - Clears Cloudy Spa Water (16 fl oz & 32 fl oz)
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Hot Tub Things® Metal Out (16 fl oz) – Spa & Hot Tub Stain & Scale Preventer
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Hot Tub Things® Calcium Increaser – 32 oz Spa Hardness Booster
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Hot Tub Things® Cartridge Cleaner – Deep-Soak Filter Cleaner 32 oz
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Hot Tub Things Spa Defoamer – Instant Anti-Foam Treatment (16 fl oz)
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Hot Tub Things™ Instant Cartridge Cleaner - Spray-On Filter Cleaner (32 fl oz)
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Hot Tub Things® Jet Line Cleaner (16 fl oz) – Spa & Hot Tub Plumbing Cleaner
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Hot Tub Things pH & Alkalinity Down – 1.25 lb Granular Spa Water Reducer
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Hot Tub Things® Bromine Tablets – Spa & Hot Tub Sanitizer (1.5 lb & 5 lb)
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Hot Tub Things™ Brand Filters – Premium Quality for Every Spa
Hot Tub Things® 282 Microban® Filter 2‑Pack – Replaces Bullfrog® 10‑00282 – for A/R/X Series (2018+) – part #HTT‑10‑00416
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Hot Tub Things® Inner Filter – Sundance® 880/850 Series (2009–2023) – Part #HTT‑6473‑164S
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Hot Tub Things® Disposable MicroClean® Filter – Sundance® 6540-502S Compatible (Upper Cartridge, 2002–2024) – Part #HTT-6540-502S
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Hot Tub Things® Outer Filter – Sundance® 880/850 Series (2005–2023) – Part #HTT‑6473‑165S,
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Hot Tub Things® Flat Filters 4‑Pack – Fits Simplicity® by Bullfrog Spas (2018+) – part #10‑00814
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Hot Tub Things® Filter Cartridge – Compatible with Jacuzzi® ProClear® 60 sq ft – Part #HTT-6000-383AJ
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Hot Tub Things® Bottom Filter – Sundance® 75 Sq Ft Cartridge (2004–2024 Spas) – Part #HTT‑6540‑501S
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Hot Tub Things® 880 Inner Filter (2024+) – Replaces Sundance® 6473‑453S
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Hot Tub Things® Outer Filter – Sundance® 125 Sq Ft Cartridge (2003–2024 Spas) – Part #HTT‑6540‑488S
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Hot Tub Things® 880 Outer Filter ( mid 2024+) – Replaces Sundance® 6473‑452S
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Hot Tub Things® 281 Microban® Filter 2‑Pack – Compatible with Bullfrog® Spas - part #HTT-10‑00810
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Pillows, Headrests & Comfort Accessories
Frog® Hot Tub Water Care Systems – Mineral Sanitizers for Crystal Clear Water
Frog® @ease® SmartChlor® Cartridge 3‑Pack – Bullfrog® Spas Classic – part #10‑01053
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Frog® @ease® SmartChlor® Sanitizing System – Bullfrog® Spas Classic – part #10‑01053
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Frog® @ease® SmartChlor® Cartridge 3‑Pack – Sundance® Spas – part #6473-297
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Frog® @ease® SmartChlor® Sanitizing System – Sundance® Spas – part #6473-296
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Frog® @ease® SmartChlor® Cartridge 3‑Pack – Jacuzzi® Hot Tubs – part #6473-295
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Frog® @ease® SmartChlor® Sanitizing System – Jacuzzi® Hot Tubs – part #6473-294
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FROG Maintain for Hot Tubs - Non-Chlorine Shock for use with All Hot Tub FROG Sanitizing Systems - Single Dose Packets for Easy Hot Tub Maintenance & Treatment - 12 Pack
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FROG® @ease SmartChlor Cartridge 3‑Pack for Bullfrog® Spas – Simplicity Series (2019+) – part #10-01062
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FROG® @ease Sanitizing System for Bullfrog® Spas – Simplicity Series (2019+) – part #10-01059
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FROG @Ease Test Strips for Hot Tubs and Swim Spas - Test Strip with Out Indicator for FROG @Ease SmartChlor Cartridges, pH, Total Alkalinity and Total Hardness - 30 Test Strips
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Frog® @ease Floating SmartChlor Sanitizing System for Hot Tubs – part #01‑14‑3256
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FROG Jump Start for Hot Tubs - Start-Up Chlorine Shock Removes Organic Contaminants & Establishes Chlorine Level - Hot Tub Set Up & Treatment - 12 Pack
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Chemicals - Chemical Holder
FROG® @ease® Cartridge Holder for Bullfrog® Spas – part #10-01006
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FROG® @Ease Cartridge Holder for Sundance® 780 / 880 / 980 (2021+) – part #6473-315
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FROG® @ease Holder Bracket (Jacuzzi® Hot Tub) – Clip for Mineral & SmartChlor Cartridges – #6473-316
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FROG® @ease Floating 2-in-1 Holder for Sundance® Spas – For SmartChlor & Mineral – part #6473-334
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FROG® @ease 2-in-1 Cartridge Holder – Jacuzzi® Hot Tub Floating System Dock – part #01-14-3276
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Bullfrog® @Ease® Simplicity™ Housing Assembly (2-Piece Clamshell) – Part #10-04669
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FROG® @ease Swim Spa Sanitizer Tether – BPA-Free Silicone, Reusable – part #01-14-3862
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Why Customers Love Us!
"I love supporting a Bay Area business, and Hot Tub Things never disappoints. My filter order arrived the next day, and everything was exactly as described. Definitely my go-to from now on."
Amanda K.
"After checking multiple stores, Hot Tub Things had the best prices on my Jacuzzi chemicals. The order process was smooth, and I even got a thank-you note in my package. It’s nice to shop with a company that values its customers."
Michael S.
"I ordered replacement filters and some water care supplies, and they arrived within just two days—faster than I expected! One item was out of stock, but customer service emailed me right away and offered a great alternative. Truly impressed."
Sarah P.
"Finding the right part for my Sundance spa used to be a nightmare until I found this site. The part numbers are clear, and their compatibility notes helped me avoid a costly mistake. Five stars for accuracy and ease!"
Lisa J.
"I’ve placed multiple orders over the last six months, and everything has gone smoothly. Their email updates keep me informed, and I appreciate their curated product suggestions. It’s the only place I shop for my hot tub now."
Danielle T.
"I called with a question about the right filter size for my Sundance spa, and the rep walked me through everything. It’s rare to find that kind of expertise these days. Excellent experience from start to finish."
David W.
"I’ve ordered multiple times now—steps, covers, filters—and every single order has been perfect. Fast shipping, well-packed products, and top-notch quality. Highly recommend for anyone in the Bay Area."
Rachel P.
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