AquaChek 641426E Swimming Pool and Spa Nitrate/Nitrite Test Strips, 25 Strips, 2 Pack

AquaChek's Nitrate Nitrite test strips give pool owners an easy, effective way to test for high nitrate-nitrite levels in their pool, which can cause uncontrollable algae growth and chlorine depletion that wreck pool usability. Considered the X-factor when diagnosing difficult pool problems, Nitrate Nitrite produces a quick, accurate reading of your nitrate-nitrite levels, which, if high, can be treated to restore chlorine's normal effectiveness and eliminate out of control algae.