Pondlab 200 multi test kit provides over 200 tests of 6 water parameters ph gh kh nitrite nitrate anf ammonia with full instructions integral test tube rack for ease of use optimum levels and suggestions for correctionr winner of the best test kit award in koi magaziner containsr ph 30 testsr ammonia 30 testsr nitrite 30 testsr nitrate 30 testsr kh 40 testsr gh 40 testsr 200 tests to check water quality essential to ensure the health and vitality of you fishr we strongly recommend re