Precision Aqua Phos-Ph4deReady to use phosphate remover, 5 litre drum. Dosing: For medium to high stocked aquariums, dose between 50 100ml per day for every 1000 litres of system volume. Application method: Dose directly onto the head of foam within the riser tube of the protein skimmer cup. It is essential test phosphate levels regularly and adjust the dosage based on your results. Safety information: This product contains lanthanum chloride and deionised water, creating a