I have a mag 7 in my tank, has been there roughly 9 months now. This thing was loud sitting on the glass with vibrations, the guy at my LFS said to put a mouse pad under it and it will be fine. So I did, and it worked with no ill effects on the tank that I could see. With that being said, the mousepad now is starting to dissolve in the water which one could assume that isnt good for the tank itself. I know if I remove it, I will have the loud noise again. What do you guys recommend to keep this thing quiet and off of the bottom glass.