Marine Metal Bubble Box Aerator 2/D-Cell
Aerates up to 7-1/2 gallons. Pumps 7/8 liter of air/minute. Runs quietly up to 33 hours on 2 alkaline 'D' cell batteries. Adjustable stainless steel clip and fasteners. Individually tank tested. Weighted airstone. Beryllium copper battery contacts. Diaphragm pump. Fresh or salt water.