The ultimate Phosphate Remover for fresh water. Microbe-Lift Pond Phosphate Rrmover is a polymeric blend with outstanding qualities, including the ability to tie-up large quantities of phosphate without negatively influencing the pond water in any way. Phosphate-caused by the decomposition of organic substances such as food surpluses, dead plant matter and excretion-is only harmless in concentrations below 0.3 ppm in fresh water. Will not harm fish or plants. Safely removes phosphate from pond water.