2-Inch Bio Sponge Ball With Filter Media Bag For Aquarium And Pond, 24-Piece

Super-size it – the 2 bio sponge balls make a great bio filter material for aquariums and ponds. When used in trickle tower type filters their larger diameter is excellent for removing those harmful gases from your water. They can strip co2 nitrogen and other gases while increasing dissolved oxygen levels dramatically. Higher dissolved oxygen levels mean healthier fish lower stress levels higher growth and increased disease resistance.