Question for you biocube people. I just plugged the main pump in. It's not that noisy, and it hasn't seen water for a few weeks, so a little breaking in is to be expected. If things don't quiet down some, I'll be looking for something different. I'm not worried about increasing the flow, but definitely don't want to lower it. Any suggestions on a pump that will flow the same or just a little more, but runs quieter? Flaws in the stand design and location are showing up little by little. With the open back, and placement in a corner, any noise that is able to transfer down through the tank and into the stand is amplified. If you are an audio guy like me, think of the stand as a subwoofer box, and the corner of the room defecting all sound out around the stand. It would be a perfect setup for a real sound system. Not so much in this case.