Suitable for Fresh & saltwater. Contains a full complement of test equipment: - test pipette glass test tube and cap lab base instruction booklet. Regular testing is essential for: - mature aquariums tap water that contains nitrate aquariums containing large species heavily stocked aquariums planted aquariums. Because persistent nitrate levels can indicate: - overcrowded aquariums tap water that contains nitrate large organic accumulations. - Nutrafin Test Kit- Nitrite for Fresh and Salt water- 0.0 - 3.3 mg/l- 75 tests