Phosphate Remover covers a commonly overlooked area of aquarium keeping. Reduce the amount of phosphate in your aquarium and you will help inhibit the amount of Algae growth. NT Labs Phosphate Remover permanently removes phosphate locking it away and starving the Algae of its food source. A suitably sized filter media bag is included for ease of use. Simply add the required amount of media to the filter bag, rinse under the tap and add to your filter.