As we all know, oxygen is vital to all aquatic inhabitants whether they are koi, goldfish, tropical / marine fish or bacteria. The Evolution Aqua Airpump range provides high performance diaphragm air pumps for all fishkeepers. The range was purposely developed for fishkeepers to deliver that essential element into their ponds - specifically air. This airpump has been tested and proven to provide the highest output at any given depth, to be economical to run and totally reliable. Well engineered, robust and durable, every unit has thermal protection fitted as standard. Maximum Output: 150LPM Output at 1m Depth: 130LPM Max operating depth: 5.5 metres Power usage: 106 Watts dba: