As phosphate increases, so does the chance of having unsightly algae and green water blooms. Test reads 0 to 10 mg/ or parts per million (ppm) of phosphate in fresh or salt water.

As phosphate increases, so does the chance of having unsightly algae and green water blooms. Test reads 0 to 10 mg/ or parts per million (ppm) of phosphate in fresh or salt water.