API 5 in 1 Aquarium Test Strips are the quick and accurate way to test for pH, Nitrite, Nitrate, General Hardness and Carbonate Hardness. Desiccant-lined tube, with snap-tight cap, provides maximum moisture protection for accurate results.
Highly precise color charts. Dip directly into aquarium – no separate vial needed. Includes information on how to correct unsafe water conditions. For fresh and salt water