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Instructions to use:1) Do not submerge the air pump into the water.2) Air Pump must be placed above water level3) Do not oil at any time.4) Disconnect theplug if the pump fails.5) Clean or replace the tube or air stone regularly to obtainmximum aeration nd longer life.Important Safeguard:1) Disconnect the plugs of the electrical aquarium appliances before putting hand into the water.2) We recommend that the air pump and electrical aquarium devices, should be connected to power supplies with ground to avoid fault circuit interrupters.