Replacement Sponge Filter Bob 2St

The internal BOB sponge filter is equipped with a pump that sucks in water. This results in a larger capacity than an air-driven sponge filter. This has the great advantage that more water is filtered and that there is greater flow in the aquarium. Because of the fine sponge, this double sponge filter is 100% safe, even for shrimp. It removes even the smallest particles of dirt from the water.