I bought a deep water air pump from tetra tec at big al's, the smallest model and found out the darn thing is noisy as hell during the night (the tank is in my room). I was wondering if the smallest model of the rena is much more quiet than this? that's the only other one they sold at the store that seems like a good quality. I'm thinking of exchanging it today or should i just keep the one i have? anyone have experience on running both of these pumps? especially in their bedrooms. thanks.