With the Salifert Profi Test PO4 you can determine the phosphate content in freshwater oder seawater exactly and easily. Phosphate also blocks or retards the growth of corals and calcareous algae. One of the scientific studies shows that a phosphate concentration higher than 0.05 mg/L decreases the growth of calcareous algae by 90%! The Salifert phosphate test already detects, within seconds, 0.015 mg/L of phosphate. This makes phosphate measurement highly reliable and informative allowing timely measures to be taken. The Salifert Profi Test PO4 -Phospahte- can perform approx. 60 measurements.