I just purhcased a PSK-75, put it in my sump and the thing hums terribbly. I removed the pump from the skimmer body and it quiets down. It seems that with no dampening the skimmer body resonates the vibrations from the pump. I even tried suspending the skimmer in my hand without letting it touch the sump and still the same noisy hum. I'm wondering if this is normal form your testing and if not, what can be done? If it is normal, do you offer some sort of bracket and suction cup system? I see that there are rails for a bracket on the back of the pump. Also, do you have plumbing if I would like to isolate the pump like this? When I purchased this from the Saltwater Store, the image that they have for the product shows the pump detached with a hose leading to the cone. This is what I though I was getting.