Fish Mate Supra + Biological Filter Media has a large surface area for beneficial bacteria breeding. It reduces ammonia and nitries in your pond or aquarium.
INSTRUCTIONS: Rinse filter medium in water before use. Place in the filter. Replace 50% of used media every 12 months. For ponds completely fill the biological media section of your filter with filter media. For freshwater aquariums use 1 pack for every 40 gallons and for marine aquariums use 1 pack for every 2 gallons.