The SlimSkim Nano is a specially designed internal skimmer for nano and mini-reef aquariums. The SlimSkim's unique intake design will draw from the water's surface, reducing disgusting surface bio-slicks. Once inside, the energy-efficient venturi air pump adds countless small, uniform bubbles, perfect for capturing aquarium waste and carrying it to the adjustable collection cup. With its compact and sleek design, the SlimSkim Nano is the ideal addition to your nano tank!