API 5 in 1 Aquarian 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.

Directions: Dip directly into your aquarium and compare the colour against the highly precise colour charts
Includes information on how to correct unsafe water conditions

Includes 25 strips. For fresh and salt water