The Fission Nano-Skimmer is the smallest protein skimmer in the world, measuring only 6.5" high and 2" in diameter. Powered by an efficient air injection pump, the patented design rips bubbles into a vortex foam froth, breaking apart proteins and organics, removing them from your nano-home. Easy-to-install, this nano-skimmer packs the power of fission into pint sized perfection. Specifications Recommended for aquariums up to 12 gallons. Step into a world that fits in the palm of your hand Power pump—Air injection submersible pump pushes 84 gallons per hour through the skimmer, mixing bubbles and organics in a tornado fashion. The result: a dry foam froth that will make you go yuck! Patended design—Unique submersible design fits into almost any nano-style aquarium system. Put the pump next to it, beside it, or under it, it fits almost anywhere. Pint size - The compact size of 6.5" H x 2" Dia. makes it easy to hide in tanks and filters.