Max output 75lpm Max output 1m depth 62lpm Max operating depth 3.9m As we all know, oxygen is vital to all aquatic inhabitants whether they are Koi, goldfish, tropical / marine fish or bacteria. The EA 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. EA Airpumps have been tested and proven to provide the highest output at any given depth, to be economical to run and to be totally reliable. Well engineered, robust and durable, every unit has thermal protection fitted as standard.