Recirculates water to aerate the tank while boat is underway. Includes an A500 Aerator pump which feeds a separate aerator spray head into the livewell. Kit can be added to any tank that already has a fresh water fill system. Contains the following: A-series A500 Aerator pump with short inlet- barbed outlet, stainless steel strainer, Spray Head, 3/4" dia. poly hose-24" long, and two plastic hose clamps.