AquaChek 512082-02 TruTest Digital Test Strip Refills for Swimming Pools, 50-Count, 2-Pack

For use with the AquaChek trutest digital test strip Reader. Bottles have a convenient flip top cap for easy dispensing!  just dip a test strip in your pool or spa, insert the strip into the meter & get fast accurate results! to keep your pool at its best, test at each end a minimum of twice a week. Tests for 3 important chemistries in S: free chlorine/bromine, pH, total alkalinity. 2 Pack includes two sets of 50 Strips.