Cleanwater Blue 3-Way Test Strips are required for testing the copper ion level of
the Cleanwater Blue system. Also measures Total Alkalinity (TA) and pH, to allow you to easily and correctly balance your water. Since you only need to measure the low-maintenance Cleanwater Blue System twice per month, one bottle of 25 test strips will last about a year!
Product notes: Test measures the active mineral content (copper ion),
plus Total Alkalinity (TA) and pH levels. For use with Cleanwater Blue System only.