I have bought many of these in the past and all were a disappointment. I am looking to buy my last one but need some power to it. All the ones I have bought were diaphragm. I need some suggestions. I would like to put the pump under the floor and have it pump up so I dont hear the hum or buss. My last pump was a Tetra deep dw96 and was not happy with it. Can you still buy the old belt drive pumps? Now they were able to pump some air