Kent Marine Nitrogen Sponge test kits Built-in Check valve

Built-in Check valve

Height of intake side: center 2

The carbon is weighed after and the amount of loss measured

Includes Double Sided Adhesive

Kent Marine Nitrogen Sponge test kits Built-in Check valveKENT MARINE NITROGEN SPONGE is a granular zeolitic medium that directly adsorbs ammonia in freshwater and fosters anaerobic bacteria growth to reduce nitrate levels in both marine and freshwater aquariums. Directions Use 1 cup for each 20 gallons of aquarium water. More can be used for greater effectiveness. Rinse with fresh water before use (preferably reverse osmosis or de ionized water). Place in a large mesh bag (800 micron) or a canister filter,