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ThermoSpas easy to use test strips and specially formulated products make keeping your water safe and crystal clear effortless. Always be sure to correct your alkalinity first and then the pH level. Your pH should be kept between 7.2 – 7.8 and the ideal alkalinity level is between 80-120 ppm and calcium hardness should stay within 200 – 400 ppm.

Simple Conversion Table:
3 Teaspoons = 1 Tablespoon = 0.5 ounce
(The cap on our Spa Activator is equal to 1.5 ounces or 3 Tablespoons)

Water Balancing

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Ph/Alkalinity Up 2 Lb Raising Ph/Alkalinity

Simplify the balancing of your water while extending the life of your spa equipment.

Price $10.99
Ph/Alkalinity Down 3 Lb Lowering Ph/Alkalinity

To lower alkalinity without lowering the pH level run the spa on high speed and add one ounce for every 10 ppm in a 500 gallon spa in just one area of the spa. When lowering alkalinity add as much at one time as necessary.

Price $11.99
Stain and Scale 1 Qt Stain and Scale

With low mineral content add 2 ounces per/100 gallons on initial fill and 1 ounce per/100 gallons weekly.

Price $14.99
Natural and Clear 1 Qt Natural & Clear - Green Technology

Natural & Clear is a natural enzyme that breaks down the organics and contaminants in the water, purifying the water, helping to prevent oil slicks and common water scum lines.

Price $11.99
Spa Foam Away 1 Qt Spa Foam Away

Foaming in your water has a variety of causes. Though it is not harmful to you or your spa it does minimize the effectiveness of your sanitizer.

Price $14.99
Liquid Calcium 1Qt Liquid Calcium

In a 300 gallon spa Liquid Calcium raises the calcium level 15 ppm per/ounce.

Price $8.99
Protection Plus 1Qt Protection Plus

With low mineral content add 1 ounce per/100 gallons on initial fill and .5 ounce per/100 gallons weekly.  With high mineral content add 3 ounces per/100 gallons on initial fill and 1.5 ounces per/100 gallons weekly

Price $17.99
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 $59.99
TruTest Digital Strips TruTest Digital Strips

50 test strips to get accurate readings of sanitizer (both chlorine and bromine), pH, and total alkalinity.

Price $9.99
AquaChek 6-in-1 Test Strips AquaChek 6-in-1 Test Strips

The simplest and most economical spa and pool test strips on the market.

Price $8.99
pHin Smart Water Care Monitor and App pHin Smart Water Care Monitor and App

pHin is reinventing hot tub care with a WiFi-enabled smart monitor and a mobile phone app to take away the guesswork. It’s the perfect addition to your ThermoSpas hot tub and as easy as Monitor, Notify, Add!

Price $299.00