The quick and easy way to measure the Alkalinity and Calcium levels of your spa is to use Ozone Test Tablets
Ozone Test tablets will measure the total alkalinity and calcium levels in the water.
There are two different ozone test tablets: Ozone Calcium test tablets and Ozone Alkalinity test tablets.
Testing for calcium and alkalinity need only occur once a month.
Ozone Calcium Test Tablets & Ozone Alkalinity Test Tablets are sold in vials of 250 tablets.
