Coral Vue Technology OCT-BH50 Reef Octopus Nano in-Tank Skimmer Rated up to 50 Gallons Dim:5.1"x5.5"x13.8" The body size is 3", while the footprint is 5.1" x 5.5", with a total height of 13.8". It is powered by an OTP 300s Pinwheel Pump The BH-50 Multi-Mount Protein Skimmer can handle a heavy filtration demand in a 30 gallon aquarium