Deltec Hangon SkimmerThe MCE400 has a compact design. This allows the unit to hang onto aquariums with limited external room, and gives it the flexibility to hang on almost any brand of aquarium. Features Compact design. Can be hung on the outside of the aquarium or sump. Draws its own water from the aquarium via the internal needle wheel pump. Extremely low power consumption. Quick and easy removal of the pump. Includes mounting brackets to hang outside the aquarium or