The EA air pump 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 air pumps 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. This pump is perfectly suited to a pond with a volume of around 680 litres (500 if keeping fish and 230 if keeping koi).