Salifert's Phosphate Test Kit helps prevent problematic phosphate build-ups by allowing you to detect the problem early. Too much phosphate in your aquarium can result in slowed coral growth, while pest algae growth is accelerated. Fish food is the most common source of phosphate input in aquariums, and levels above 0.05 mg/L can already prove problematic. The Salifert Phosphate Test Kit gives you accurate results within seconds, allowing you to take action against phosphate build-up as soon as possible. This kit provides approximately 50 tests per box.