I'm looking for some feedback on a quiet air pump for my aquarium. I have a 55 gallon tank but I only need an air pump for one or two air stones. I have a Rena 200 right now and it's driving me crazy with vibration noise. I had a Rena 200 years ago and it seemed to be very quiet. I started off with a Rena 300, way too noisy for me so I got a 200 and it's quieter than the 300 but has a terrible vibration noise to it. I have it sitting on 3 pieces of cut out carpet and have read where to put black electrical tape around it. okay so I did that and also have 2 rubber bands around it but still drives me nuts. When I pick it up and squeeze it tight, it's very quiet but once I release it forget it. I don't want to keep soaking money into these air pumps so thought this is the best place to get some reviews and opinions. Thanks!