Airtech 70 Air Pump Kit from Evolution Aqua. CascadeBitz & Evolution Aqua know that oxygen is vital to all pond inhabitants whether they are Koi, goldfish 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 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. The Airtech 70 Complete Kit includes. 2 high quality airstones at 80mm x 30mm. Rubber elbow and clips (for when placed in fitted areas). Evolution Aqua Airtech 70 Complete Kit If you require any help or assistance with this product, please call the shop or look for cascade koi. Max Flow 70 Lpm. Max Depth 3.2m. The item “Evolution Aqua Airtech 70 Koi Pond Air Pump Kit” is in sale since Tuesday, June 27, 2017. This item is in the category “Pet Supplies\Fish & Aquarium\Air Pumps”. The seller is “cascadekoi-aquatics” and is located in Bury, Lancashire. This item can be shipped to United Kingdom.