Home > Water Care > Sanitizers & Purifiers > ThermoClear
As a hot tub owner, you are undoubtedly looking for great ways to keep your water clean and pure.  One method for maintaining your water is to use the Thermoclear system.  With Thermoclear, you simply insert a special cartridge in the filter of your hot tub and then add Spa Activator 20 minutes before you use your hot tub.  When you use this system, your water won’t need any maintenance for up to four months at a time.  If your water is already experiencing problems, on the other hand, you can use Spa Activator to get things looking great once more.
Sort By:
Page of 1
ThermoClear Purifier Cartridge Thermoclear Purifier Cartridge

Two-step, mineral-based system that is extremely easy to use.

Price $34.99
Spa Activator (Shock) 2.2lb Spa Activator (Shock) 2.2Lb

Out of stock - Expected restock 4-6 weeks

Price $21.99
(3 Pack) Spa Activator Shock 2.2lb (3 Pack) Spa Activator Shock 2.2Lb

Out of stock - Expected restock 4-6 weeks

Price $35.99
TruTest Digital Tester TruTest Digital Tester

The combination of test strips and digital technology provides simple and accurate readings of sanitizer (both chlorine and bromine), pH, and total alkalinity.

Price $80.99
TruTest Digital Strips TruTest Digital Strips

50 test strips to get accurate readings of sanitizer, pH, and total alkalinity.

Price $13.99