The Hygger Mini Wavemaker is a reliable addition for marine aquariums. This little device works to create random water surges that replicate natural oceal flow and ideal conditions for saltwater ish and live corals. Available in two sizes to suit a variety of tank sizes and setups. Hygger Mini Wavemaker Highlights- Easy Use: The Hygger Mini Wavemaker features a strong magnetic suction base to make adjustments in placement quick and easy. The unit is resistant to corrosion and great for adding variable current to a saltwater marine aquarium tank. Model Specifications Model Dimensions Flow Rate Aquarium Tank Size HG021 - 3W 2.6 x 2.16 x 4.7" 530GPH 5-20G HG021 - 6W 2.6 x 2.16 x 5.7" 1056GPH 20-100G Additional Information:- Glass Thickness: 4-10mm- Cord Length: 5FT- Voltage: AC 110-120V/60Hz