air pump (melrose)

air pump for aquarium or hydroponics or small air compressor .....something with a air flow of at least 40 gallons per hour like a Pawfly Aquarium 40 GPH Compact Air Aerator Pump since for my project I need to pump air first thru a .2 micron air filter to sterilize the air to grow my mushroom cultures in, so need at least 40 gph per culture jar because of he resistance of the filter