For active fish, a vital plant growth and for biological processes in the pond sufficient oxygen is important. The Eheim pond aerator AIR is intended for the optimal oxygen supply of the pond and its inhabitants and at the same time provides a better filtration result through an improved water circulation. The bacterial degradation of harmful substances is also effectively supported through sufficient oxygen - for a healthy aquatic enviroment.Eheim Air+ super-silent pond aerator+ energy efficient+ optimal oxygen supply for fish and plants+ UV-stable and sturdy housing with a particularly robust pump technology+ easy handling+ suitable for continuous operationtechnical data Eheim Pond Aerator AIR 500:output: 540 l/hpressure: 220 mbar+ Power: 5 WPower supply: 220-240 V/50 HzCable length pump: 3 mDimensions (BxDxH): 176x118x103 mmtechnical data Eheim Pond Aerator AIR 1000:output: 1000 l/hpressure: 280 mbar+ Power: 8.5 WPower supply: 220-240 V/50 HzCable length pump: 3 mDimensions (BxDxH):