Hydro-Sponge IV -bulk

While other sponge filters require suction cups that quickly fail or flimsy bases that allow the unit to fall over, the Hydro-Sponge filters are free standing with a heavy base that locks securely in place, but is easy to unlock if needed and is raised to allow sufficient space so that there are no dead areas between the aquarium floor and the filter.

Our quality design brings the sponge filter to a whole new level as a serious filtration system that out competes under gravel biological filters and goes toe to toe with any other filtration system. Breeder tanks, shrimp and invertebrates, tanks on the go, the need for quick bio-cycling, are all obvious applications for sponge filters, but many hobbyists are finding that the Hydro-Sponge is an excellent filtration alternative for any aquarium set up.

1. One inch diameter lift tube moves more water than other sponger filters and
2. may be connected directly to a power head without the need of adapters in order to increase water flow and circulation
3. Use with or without an airstone
4. Easy to assemble and clean (all the pieces snap easily into place)
5. Safe for baby fish and invertebrates
6. Available in five sizes

Hydro-Sponge Filter Size Comparison