Easy to assemble Operated with an air pump (Sold Separately) Safe to use with baby fish of any size Hollow centre allows carbon to be added Weighted base Simple to maintain Breeders favourite The Aqua One Filter Air range of breeding sponge filters are available in 3 sizes to suit a range of aquarium requirements. Choose from either the 30, 60 or 135 model depending on your needs. Ideal for breeding or shrimp tanks, these filters are extremely quick and easy to use and can be set-up in minutes. Despite their simplicity the Aqua One Filter Air range will provide your aquarium with ample filtration due to the oversized foam filters which can even hold carbon if desired thanks to their hollow centre. Ideally suited for use with the Aqua One Air O2 Pod Air Pumps (available separately) the Filter Air range of breeding sponge filters tick all the boxes and are even incredibly simple to maintain.