Matala Hakko MEA Pro 2 PLUS EZ-air Pond Aeration Complete System For ponds from 3000 to 9000 gallons Includes 1 Hakko HK25LP Linear Pump, 30' of 3/8th airline, and 1 MDB11 diffuser w/ base maximum air flow of 32 liters per minute or 1.1 cubic feet per minute 24 watts