AquaChek 512082-02 Trutest Digital Test Strip Refills (2 Pack)

4-IN-1 TEST STRIPS: Tests the most critical parameters for keeping a clean & balanced pool or spa; for free Chlorine/Bromine, pH, and Total Alkalinity
AQUACHEK ACCURACY: Using medical industry technology, our test strips offer comparable accuracy to liquid tests; No measuring & counting drops of reagent, leaving less room for error
EASY TO USE: No interpreting colors; Just dip the test strip, remove it, & insert it on the test strip reader; Accurate digital results in 15 seconds; Test water at least twice a week