The API pH Test & Adjuster Kit not only allows you to easily and accurately test the pH level in your freshwater aquarium, but also allows you to adjust it to a safe parameter for your fish. The pH Test & Adjuster Kit tests pH from 6.0 to 7.6, and includes bottles of pH Up and pH Down to modify pH in aquarium water to desired levels. Product contains 250 tests, so you can get the most out of your kit for years of fast, accurate testing.