If phosphate is present in too high a concentration there may be an increase in growth of undesirable algae and if the phosphate level is higher than 0.04 mgL the growth rate of corals and calcareous algae may decrease by as much as 90.
Washing fish food a rich source of phosphates after thawing can significantly reduce the input of phosphate and using a high-grade phosphate-free activated carbon can also help to keep phosphate levels as low as possible. The Salifert Phosphate test kit detects in less than 5 seconds the level of phosphate present. There are two different ranges within the kit a low range for phosphate phosphor from 0.01 1 mgL and a medium-range for phosphate phosphor from 0.02 2 mgL. Sufficient for 60 tests.