AquaChek 561625A Blue Biguanide Test Strip for Swimming Pools
Tests for:  Biguanide, Total Alkalinity, and pH. Ideal for customers who use biguanide as a sanitizer in their pool or spa. Biguanide is a chlorine-free sanitizer such as BAQUACIL Chlorine-Free Swimming Pool Sanitizer and Algistat, BaquaSpa Sanitizer, Softswim Bactericide, PolyClear For a clean and healthy pool, test the water at each end a minimum of twice a week! Tests for 3 important chemistries in seconds: Biguanide, Total Alkalinity, and pH.