Aqua Pics Phosphate Remover Marine 250ml

Liquid phosphate remover—dramatically reduces phosphates. Excessive amounts of phosphates can lead to serious problems in your aquarium, including green water, unpleasant odour or too little dissolved oxygen. Starver-m corrects phosphate levels and is safe for anemones, clams, shrimp & soft corals.

Directions: Add 5ml to 100 litres of water every 2 to 3 days. If phosphate levels are greater than 1ppm, Starver-m should be used at 5ml to 50 litres until algae subsides. 

Once you have completed the treatment, take a water sample to your aquarium or pond professional to be tested for phosphates. Once you have achieved a phosphate level of less than 0.02ppm you should add a maintenance dose of 5ml to 100 litres every 2 weeks.

More effective in alkaline water.  Acidity can reduce effectiveness.