Medium Air Pump. This powerful pump kit will produce an abundance of aeration in the water garden pool for pools up to 5000 gallons. It produces 13 gallons of air per minute. Operates at a maximum depth of 11’5”. Has a 12 air outlet metal manifold (can make 12 tubes of air), check valves (keeps water from backing up into the tubes), and comes with 2” inch sintered air stones. Certified for outdoor use but recommended that unit is enclosed to protect against elements. Cord 32’8”. 35 Watts. Size approx. 9”x7”x6.5”.