Contains one (1) API POND MASTER TEST KIT Pond Water Test Kit 500-Test, including 6 bottles of testing solution, 3 color cards and 4 glass test tubes with cap. Helps monitor water quality and prevent invisible water problems that can be harmful to fish. Measures ornamental pond pH balance, Ammonia content, Nitrite levels and Phosphate content. Contains six test bottles, instructions, glass test tubes and color charts for 500+ tests. Use weekly for monitoring and when water or fish problems appear