Tropic Marin Elimi-Phos rapid removes extremely rapid and highly-effective increased phosphate contents in fresh and marine water aquaria. Excessive concentrations of phosphates in the water can lead to strong alage growth and a reduction in the growth of corals and aquatic plants. This is why it is important to monitor the phosphate concentration in an aquarium regularly and maintain the level in the optimum range for the organisms in question (freshwater: Tropic Marin Elimi-Phos rapid+ extremely rapid removing of high phosphate concentration+ highly-effective solution on the basis of Lanthanum+ Phosphate concentration can be lowered quickly to a range between 0.2 - 0.4 mg/l (ppm)Usage of Tropic Marin Elimi-Phos rapid:Measure the phosphate concentration in your aquarium water. It is recommended to reduce the phosphate concentration by no more than 0.3 mg/l per day, i.e. by adding a maximum of 3 ml of Tropic Marin Elimi-Phos rapid to 100 l aquarium water.