Phosphates can enter your aquarium through tap water, fish waste, and decomposing organic matter such as uneaten food and dead algae. Excess phosphates contribute to the growth of unwanted algae and green water blooming, and in saltwater, excess phosphates can hinder the growth of hard corals.

The API® Phosphate Test Kit tests phosphate levels from 0 to 10 parts per million so you can easily monitor the condition of your aquarium water and can be used in both freshwater and saltwater tanks.

Contains 150 tests and includes 2 test solutions, easy-to-read instructions, a glass test tube, and 2 color charts.