High powered mid-size diaphragm Air Pumps. Excellent for small multiple tank installations or single large tanks, model number is DAPMH-15 . Comes with a diaphragm replacement that I bought for almost $20.00. I'm asking $50.00 firm. Looks exactly like the one on this link.
http://www.jehmco.com/html/diaphragm_air_pumps.html#DAPMH8-15
http://www.jehmco.com/html/diaphragm_air_pumps.html#DAPMH8-15