Heavy waste loads associated with turtle and amphibian habitats require more power and greater filtration efficiency that a conventional air pump or low-flow submersible aquarium filter can provide. Compact and performance-tested, the Penguin Power Sponge Filter has the capacity and the muscle to handle tough jobs with ease. It delivers constant, powerful waterflow at an unmatched rate of 170 gph. It's open-cell sponge efficiently traps and filters heavy waste. It also provides vital biological filtration. And the reusable sponge slides off easily for cleaning or replacement. The Penguin Power Sponge Filter is U/L and CSA listed. Its epoxy-sealed, moisture-proof motor and electrical components ensure safe operation. The high performance energizer ensures silent operation and is impervious to water. The adjustable flow diffuser directs water current in any direction to ensure maximum circulation and surface agitation. And because it's so compact, the Penguin Power Sponge Filter can be concealed behind rocks, plants or corals to create unique waterfall effects. Plus, it's perfect as a reverse flow power head for super-efficient undergravel filtration, delivering oxygenated water to even the deepest layers of the gravel bed. Reverse flow elbow and mount are included (elbow fits all larger diameter 0.125" to 0.75" undergravel filter lift tubes).