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Hot Tub Things

Water Care & Chemicals

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

Hot Tub Things

Hot Tub Things Filters

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

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.

Hot Tub Things

Ultimate Comfort Hot Tub Pillows

Soft, durable, and perfectly contoured hot tub pillows crafted to deliver ultimate relaxation and spa enjoyment.

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)

Shock

Hot Tub Things® Oxidizing Spa Shock – Chlorine-Free Oxygen Cleaner (1 lb / 2.2 lb / 5 lb)

Regular price From $14.13
Sale price From $14.13 Regular price $0.00
Hot Tub Things® Chlorinating Granules – Spa & Hot Tub Sanitizer (1 lb / 2 lb / 5 lb)

Sanitizer

Hot Tub Things® Chlorinating Granules – Spa & Hot Tub Sanitizer (1 lb / 2 lb / 5 lb)

Regular price From $15.95
Sale price From $15.95 Regular price $0.00
Hot Tub Things® pH & Alkalinity Up – Spa Water Balancer (1 lb & 2 lb)

Balancer

Hot Tub Things® pH & Alkalinity Up – Spa Water Balancer (1 lb & 2 lb)

Regular price From $12.50
Sale price From $12.50 Regular price $0.00
Hot Tub Things® Spa Clarifier - Clears Cloudy Spa Water (16 fl oz & 32 fl oz)

Clarifier

Hot Tub Things® Spa Clarifier - Clears Cloudy Spa Water (16 fl oz & 32 fl oz)

Regular price From $12.50
Sale price From $12.50 Regular price
Hot Tub Things® Metal Out (16 fl oz) – Spa & Hot Tub Stain & Scale Preventer

Clarifier

Hot Tub Things® Metal Out (16 fl oz) – Spa & Hot Tub Stain & Scale Preventer

Regular price $22.50
Sale price $22.50 Regular price
Hot Tub Things® Calcium Increaser – 32 oz Spa Hardness Booster

Clarifier

Hot Tub Things® Calcium Increaser – 32 oz Spa Hardness Booster

Regular price $25.50
Sale price $25.50 Regular price $0.00
Hot Tub Things® Cartridge Cleaner – Deep-Soak Filter Cleaner 32 oz

Cleaner

Hot Tub Things® Cartridge Cleaner – Deep-Soak Filter Cleaner 32 oz

Regular price $19.50
Sale price $19.50 Regular price
Hot Tub Things Spa Defoamer – Instant Anti-Foam Treatment (16 fl oz)

Clarifier

Hot Tub Things Spa Defoamer – Instant Anti-Foam Treatment (16 fl oz)

Regular price $22.50
Sale price $22.50 Regular price $0.00
Hot Tub Things™ Instant Cartridge Cleaner - Spray-On Filter Cleaner (32 fl oz)

Cleaner

Hot Tub Things™ Instant Cartridge Cleaner - Spray-On Filter Cleaner (32 fl oz)

Regular price $27.50
Sale price $27.50 Regular price
Hot Tub Things® Jet Line Cleaner (16 fl oz) – Spa & Hot Tub Plumbing Cleaner

Cleaner

Hot Tub Things® Jet Line Cleaner (16 fl oz) – Spa & Hot Tub Plumbing Cleaner

Regular price $22.50
Sale price $22.50 Regular price $0.00
Hot Tub Things pH & Alkalinity Down – 1.25 lb Granular Spa Water Reducer

Balancer

Hot Tub Things pH & Alkalinity Down – 1.25 lb Granular Spa Water Reducer

Regular price $24.50
Sale price $24.50 Regular price $0.00
Hot Tub Things® Bromine Tablets – Spa & Hot Tub Sanitizer (1.5 lb & 5 lb)

Sanitizer

Hot Tub Things® Bromine Tablets – Spa & Hot Tub Sanitizer (1.5 lb & 5 lb)

Regular price From $30.94
Sale price From $30.94 Regular price $0.00

Hot Tub Things™ Brand Filters – Premium Quality for Every Spa

Hot Tub Things® Inner Filter – Sundance® 880/850 Series (2009–2023) – Part #HTT‑6473‑164S

Filter

Hot Tub Things® Inner Filter – Sundance® 880/850 Series (2009–2023) – Part #HTT‑6473‑164S

Regular price $35.95
Sale price $35.95 Regular price $0.00
Hot Tub Things® Outer Filter – Sundance® 880/850 Series (2005–2023) – Part #HTT‑6473‑165S,

Filter

Hot Tub Things® Outer Filter – Sundance® 880/850 Series (2005–2023) – Part #HTT‑6473‑165S,

Regular price $60.95
Sale price $60.95 Regular price $0.00
Hot Tub Things® Flat Filters 4‑Pack – Fits Simplicity® by Bullfrog Spas (2018+) – part #10‑00814

Filter

Hot Tub Things® Flat Filters 4‑Pack – Fits Simplicity® by Bullfrog Spas (2018+) – part #10‑00814

Regular price $69.95
Sale price $69.95 Regular price $0.00
Hot Tub Things® Filter Cartridge – Compatible with Jacuzzi® ProClear® 60 sq ft – Part #HTT-6000-383AJ

Filter

Hot Tub Things® Filter Cartridge – Compatible with Jacuzzi® ProClear® 60 sq ft – Part #HTT-6000-383AJ

Regular price $45.95
Sale price $45.95 Regular price $0.00
Hot Tub Things® Bottom Filter – Sundance® 75 Sq Ft Cartridge (2004–2024 Spas) – Part #HTT‑6540‑501S
Hot Tub Things® 880 Inner Filter (2024+) – Replaces Sundance® 6473‑453S

Filter

Hot Tub Things® 880 Inner Filter (2024+) – Replaces Sundance® 6473‑453S

Regular price $39.99
Sale price $39.99 Regular price $0.00
Hot Tub Things® Outer Filter – Sundance® 125 Sq Ft Cartridge (2003–2024 Spas) – Part #HTT‑6540‑488S
Hot Tub Things® 880 Outer Filter ( mid 2024+) – Replaces Sundance® 6473‑452S

Filter

Hot Tub Things® 880 Outer Filter ( mid 2024+) – Replaces Sundance® 6473‑452S

Regular price $69.99
Sale price $69.99 Regular price $0.00
Hot Tub Things® 281 Microban® Filter 2‑Pack – Compatible with Bullfrog® Spas - part #HTT-10‑00810

Frog® Hot Tub Water Care Systems – Mineral Sanitizers for Crystal Clear Water

Frog® @ease® SmartChlor® Cartridge 3‑Pack – Bullfrog® Spas Classic – part #10‑01053

Sanitizer

Frog® @ease® SmartChlor® Cartridge 3‑Pack – Bullfrog® Spas Classic – part #10‑01053

Regular price $55.95
Sale price $55.95 Regular price $0.00
Frog® @ease® SmartChlor® Sanitizing System – Bullfrog® Spas Classic – part #10‑01053

Sanitizer

Frog® @ease® SmartChlor® Sanitizing System – Bullfrog® Spas Classic – part #10‑01053

Regular price $57.95
Sale price $57.95 Regular price
Frog® @ease® SmartChlor® Cartridge 3‑Pack – Sundance® Spas – part #6473-297

Sanitizer

Frog® @ease® SmartChlor® Cartridge 3‑Pack – Sundance® Spas – part #6473-297

Regular price $55.95
Sale price $55.95 Regular price $0.00
Frog® @ease® SmartChlor® Sanitizing System – Sundance® Spas – part #6473-296

Sanitizer

Frog® @ease® SmartChlor® Sanitizing System – Sundance® Spas – part #6473-296

Regular price $57.95
Sale price $57.95 Regular price $0.00
Frog® @ease® SmartChlor® Cartridge 3‑Pack – Jacuzzi® Hot Tubs – part #6473-295

Sanitizer

Frog® @ease® SmartChlor® Cartridge 3‑Pack – Jacuzzi® Hot Tubs – part #6473-295

Regular price $55.95
Sale price $55.95 Regular price $0.00
Frog® @ease® SmartChlor® Sanitizing System – Jacuzzi® Hot Tubs – part #6473-294

Sanitizer

Frog® @ease® SmartChlor® Sanitizing System – Jacuzzi® Hot Tubs – part #6473-294

Regular price $57.95
Sale price $57.95 Regular price $0.00
FROG® @ease SmartChlor Cartridge 3‑Pack for Bullfrog® Spas – Simplicity Series (2019+) – part #10-01062
FROG® @ease Sanitizing System for Bullfrog® Spas – Simplicity Series (2019+) – part #10-01059
Frog® @ease Floating SmartChlor Sanitizing System for Hot Tubs – part #01‑14‑3256

Sanitizer

Frog® @ease Floating SmartChlor Sanitizing System for Hot Tubs – part #01‑14‑3256

Regular price $57.95
Sale price $57.95 Regular price $0.00

Chemicals - Chemical Holder

FROG® @ease® Cartridge Holder for Bullfrog® Spas – part #10-01006

Chemical Adapter

FROG® @ease® Cartridge Holder for Bullfrog® Spas – part #10-01006

Regular price $33.50
Sale price $33.50 Regular price $0.00
FROG® @Ease Cartridge Holder for Sundance® 780 / 880 / 980 (2021+) – part #6473-315

Chemical Adapter

FROG® @Ease Cartridge Holder for Sundance® 780 / 880 / 980 (2021+) – part #6473-315

Regular price $53.42
Sale price $53.42 Regular price $0.00
FROG® @ease Holder Bracket (Jacuzzi® Hot Tub) – Clip for Mineral & SmartChlor Cartridges – #6473-316
FROG® @ease Floating 2-in-1 Holder for Sundance® Spas – For SmartChlor & Mineral – part #6473-334
FROG® @ease 2-in-1 Cartridge Holder – Jacuzzi® Hot Tub Floating System Dock – part #01-14-3276
Bullfrog® @Ease® Simplicity™ Housing Assembly (2-Piece Clamshell) – Part #10-04669

Chemical Adapter

Bullfrog® @Ease® Simplicity™ Housing Assembly (2-Piece Clamshell) – Part #10-04669

Regular price $34.95
Sale price $34.95 Regular price
FROG® @ease Swim Spa Sanitizer Tether – BPA-Free Silicone, Reusable – part #01-14-3862

Chemical Adapter

FROG® @ease Swim Spa Sanitizer Tether – BPA-Free Silicone, Reusable – part #01-14-3862

Regular price $5.25
Sale price $5.25 Regular price $0.00

Why Customers Love Us!

Hot Tub Things

"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.

San Mateo, CA
Hot Tub Things

"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.

Fremont, CA
Hot Tub Things

"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.

Sacramento, CA
Hot Tub Things

"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.

Scottsdale, AZ
Hot Tub Things

"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.

Raleigh, NC
Hot Tub Things

"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.

Palo Alto, CA
Hot Tub Things

"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.

Oakland, CA

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