Phosphate Remover Filter Foam Sponge Sheet for Aquarium/Fish Tank or Pond

The Finest Filters Phosphate Remover Foam Sheets are ideal for phosphate removal in aquariums and ponds alike This sheet measures 45 x 25cm (18" x 10"), and are approximately 12mm thick. This sheet can be cut down to size with scissors to fit most internal, external and sump filters. This foam is designed to remove Phosphate from the aquarium water, in turn helping to reduce nuisance algae associated with high phosphate levels. Phosphate in marine reef aquariums effects the calcification of stony corals, and should be kept less than 0.05ppm. In Freshwater aquariums, phosphate will fuel algae growth, and should be kept at a maximum level of 0.1ppm.