Affiliate Disclosure: As an Amazon Associate, HTReminder earns from qualifying purchases. Prices shown are current as of the last update.
Hot Tub Supplies: What Actually Matters
After testing dozens of products and helping thousands of hot tub owners, we've narrowed down what really works versus what's just marketing. This guide focuses on the essentials that keep your water crystal clear without breaking the bank.
Quick tip: Test your water 2-3 times per week. Balanced water uses fewer chemicals and extends equipment life. Our free water analyzer can read your test strip photo and suggest what you can try.
What matters: Test strips are your early warning system—skimping here costs you in chemicals later. 7-way strips test everything that matters: pH, chlorine/bromine, alkalinity, and hardness. Hot Spring and EASYTEST make the most consistent strips we've used. Store them sealed and dry; moisture destroys accuracy. Test 2-3x weekly, and always after heavy use or adding chemicals.
EASYTEST 7-Way Pool Test Strips, 150 Strips Water Test for Hot tub and Spa | Wat
$11.99
price as of Oct 27, 2026
View on Amazon
HotSpring Spas Salt Water Test Strips by Hot Spring Spas
$22.95
price as of Oct 27, 2026
View on Amazon
JNW Direct Hot Tub Test Strips for Spas - 6 in 1 Water Test [100 Pack] | Include
$12.99
price as of Oct 27, 2026
View on Amazon
FROG @ease Test Strips for Hot Tubs & Swim Spas, 30 Count | Use with FROG @ease
$10.95
price as of Oct 27, 2026
View on Amazon
Chlorine vs. Bromine: Chlorine is cheaper and works fast, but smells stronger and breaks down in heat. Bromine costs more but stays stable at hot tub temps and is gentler on skin—it's our pick for most owners. For pH balance, keep a pH Up and a pH Down on hand. Alkalinity is the foundation; always adjust that first, then pH. Weekly shock treatment prevents cloudy water and that "chlorine" smell (which is actually chloramines, not chlorine).
Leisure Time E5, Spa 56 Chlorinating Granules for Spas and Hot Tubs, 5 lbs | Mai
$29.70
price as of Oct 27, 2026
View on Amazon
AquaDoc Bromine Hot Tub Starter Kit - Complete Spa Chemicals Kit | Hot Tub Kit w
$99.99
price as of Oct 27, 2026
View on Amazon
SpaGuard Enhanced Shock, 2 lb, Single Pack | Multipurpose Shock for Spas & Hot T
$22.99
price as of Oct 27, 2026
View on Amazon
HTH Spa pH Up, 2 lbs - Raises pH, Prevents Corrosion
$10.42
price as of Oct 27, 2026
View on Amazon
HTH Spa pH Down, 2.5 lbs - Lowers pH, Prevents Scale
$13.95
price as of Oct 27, 2026
View on Amazon
What matters: A dirty filter makes your pump work harder and lets contaminants through. Clean your filter every 2-4 weeks with a dedicated spray cleaner (not dish soap—it causes foam). Replace filters every 12-18 months; they degrade even if they look clean. Keep a spare so you're never without one during cleaning.
6CH-940 Spa Filter Cartridge For Unicel, Pleatco PWW50P3, Filbur FC-0359 | For A
$30.99
price as of Oct 27, 2026
View on Amazon
Type VI Filter Cartridge for Bestway, Lay-Z-Spa, Coleman SaluSpa | Inflatable Ho
$25.99
price as of Oct 27, 2026
View on Amazon
Clorox Pool&Spa System Cleanse
$12.70
price as of Oct 27, 2026
View on Amazon
What matters: A fine-mesh skimmer catches floating debris before it clogs your filter. Run a jet line cleaner through your pipes before every drain—biofilm buildup is invisible but affects water quality. A plumbing flush like Clorox System Cleanse (under Filters & Cleaners) does this in one pass. Flush your lines when water starts looking cloudy even with good chemistry.
The Skimmie Scoop - Patented Handheld Skimmer with Fine Mesh Net for Spa, Hot Tu
$19.95
price as of Oct 27, 2026
View on Amazon
