Noisy pump in the sump!

[captexas]

Dont' use sand, it will just settle down into it and the sand will also collect waste in it. When I had a Mag12 in my sump on a tank, I used the foam with the adhesive on one side. I stuck it to the pump body, not the bottom of the sump. Then just keep the pump away from the sides of the sump and you should be good. Can also try to use some sheets of insulation foam around the inside of the stand to help deaden some of the sound.