Nitrite Test Kit

"Quickly & accurately measures the level of nitrite in pond water, reading levels from 0 ppm to 5 ppm. Makes 180 tests. Determines the level of nitrite, a toxic chemical produced when nitrifying bacteria break down ammonia in pond water. High nitrite levels may cause pond fish to suffocate & die. Includes test solution, glass test tube with cap, color chart & easy-to-follow instructions."