Cascade Internal Filters are designed to provide better filtration and aeration above and below the surface. Fully submersible, these versatile filters provide physical, chemical and biological filtration. Each filter has an adjustable & directional water flow output and a spray bar option that will distribute water evenly to aid aeration. The round directional flow spout has a connector where you can connect to your flexible tubing to drive water fountains or other accessories. Mounts quicky using the included suction cups and can be placed horizonally making it easy to place and hide in your tank. Great for aquariums and terrariums, these filters give you crystal clear water in your fresh or salt water environments. One bio-sponge and one activated carbon cartridge included. Unit runs on 110V and is UL Approved.