Pond Care Phosphate Test Kit allows you to easily and accurately measure the phosphate level and maintain a healthy aquarium or pond. Phosphate can enter your aquarium or pond through tap water, fish waste, and decaying organics such as uneaten food and dead algae. Excess Phosphate contributes to unsightly algae blooms in aquariums and ponds. In salt water, phosphate can also inhibit the growth of corals and other reef building organisms. Two liquid dropper bottles with child-resistant safety caps Easy to read instructions and two color charts Glass test tube with snap-tight cap Tests phosphate levels from 0 to 10 ppm Performs 150 tests For use in Freshwater or Saltwater Aquariums or Ponds