No ordinary protein skimmer would feature the patented needle-wheel system water pump! The powerful needle-wheel Super Protein Skimmers utilize this state-of-the-art pump, combined with an aspirating venturi, to create a fine, protein-rich foam. High-grade acrylic construction includes an easy-twist collection cup, water level adjustment dial, and bubble production diffuser. Hooks easily to your aquarium's sump system or can be used as a hang-on proteim skimmer model. Also includes an inlet silencer for ultra quiet performance.