API Phosphate Test Kit For Freshwater And SaltwaterBrand: API Color: BLUE Features: Contains one (1) API PHOSPHATE TEST KIT 150 Test Freshwater and Saltwater Aquarium Water Test Kit, including 2 bottles of testing solution, 2 color cards and 1 test tube with cap Helps monitor and adjust pH and prevent invisible water problems that can be harmful to fish and corals Reads phosphate levels between 0 10 ppm Prevents excess and unsightly algae which can cause fish stress and inhibit the growth of hard