ANS Black Biological Sponge (filtration sponge)(various size)

Bio Black Sponge
Basic Biological filtration
-Suitable for freshwater and saltwater
-Huge surface area for beneficial bacteria to live in
-Neutral pH level.
-Suitable for goldfish, tetras, koi, shrimps, parrot fish.
-Use in trickle filter, top filter, sump filtration, pond filtration, internal filter, canister filter