Add 50ml of AlgoRem for every 1000 litres (220 gallons) of pond water. Following treatment, remove as much clumped algae from the pond as possible to prevent it rotting down and releasing more nutrients into the water. It is advisable, as with any algae-removing remedy, to aerate the water during treatment. Can be used in combination with Tetra Pond PhosphateMinus. Always read the instructions carefully before use.