【Dual Purpose】This aquarium filter media serves mechanical and biological filtration, remove ammonia & nitrite and stabilize PH value, providing crystal clear water for fish to thrive.
【Vast Surface Area】Hollow design to increase surface area. Porous surface good for bacteria to colonize. Enhance water permeability and adsorption capacity.
【High Quality Material】100% aquarium safe non-metallic ceramic, will not leach aluminum or any heavy metal. It can be cleaned and reused, safe and not fragile.
【Wide Application】Great for used in freshwater aquariums, pond and saltwater fish tank. Crack into pieces to any size needed.
【Product Size】Each bio filter media measures 6.2" x 1.4" x 1.4". Package includes 90 packs ceramic filter blocks.
