Iron based liquid PO4 remover. Removes PO4 by precipitation and skimming. Watch animal behaviour when increase dosing. Always apply a power filter as part of the method. Concentration: 0,15ml / 100l = 0,03ppm raise Maximum dosing: 0,75ml/100l = 0,15ppm. Do not overdose. Start dosing: 0,15ml/100l (increase with same step for 4 days to reach maximum)