The Marineland Maxi-Jet aquarium powerhead (pump) is ideal for creating internal water movement from its fully rotational output. The Maxi-Jet incorporates a venturi aeration device to provide optimal aeration and gas exchange in the aquarium. A silencer keeps the venturi aeration device operating quietly. An adjustable air filter permits the user to fine-tune air volume and water mixing as desired. Design includes optional high flow impeller and shroud allowing you to transform the Maxi-Jet into a high flow, more dispersed powerhead.