Aqua Medic Antiphos Fe 5000 Ml

product Medic Antiphos Fe 5000ml is a highly active iron-based granular phosphate and silicate remover for fresh and saltwater aquariums to combat unwanted algae growth. product Fe does not contain aluminum and is completely non-toxic to plants and animals and is very suitable for use in coral reef aquariums. A 500g dose can treat a normally stocked aquarium for 3-6 months depending on the phosphate load. The Antiphos Fe product can bind approximately 10 g phosphate/kg. Check the phosphate level in your aquarium regularly to determine if the media requires replacement.