ITEM NAME:100x Aquarium Pond Bio Balls 16mm Canister Filter Media Wet/Dry Marine Reef Sump Descriptio n Description:.Aquarium Filter Balls. Great for fresh or saltwater aquarium filtration systems. The bio balls provide biological filtration, removing toxic ammonia and nitrite. In the event of excessive buildup, you may gently rinse with water from an established aquarium, if desired.
