Foodie Puppies Activated Carbon, Ceramic Rings 450gm, K1 Black Bio-Filter Media 1 Liter with Sponge Aquarium Filtration Combo Undergravel Aquarium Filter  (Chemical Filtration for Salt Water and Fresh Water)

Foodie Puppies Aquarium filtration Combo Ceramic ring filter media The ceramic rings are very porous, although they look solid, there are zillions of tiny holes in them, and that makes it an ideal home for the cycle bacteria that you want in the filter. Ceramic rings are extremely porous, which provides a lot of surface area for beneficial bacteria to colonize. Activated carbon filter media 100 percent pure (the purest form of) activated carbon made from mountain rocks generally used in commercial RO water plants but they are also very healthy for fish aquariums. Activated carbon is frequently recommended for use in aquarium filters. It can effectively eliminate odors, detoxify harmful metals, purify and soften the water absorb chemical residue and compounds, and water purifying effect. The surface area of this product can also allow providence for bacteria growth further enhancing water quality. It is recommended to remove unwanted colors and smells from the aquarium.