No, this hole looked like damage (Innocent smile
). I bought 2 170gal Aquateq power heads from WalMart. On of them is not working right so i will take it back tomorrow. The other is installed in the corner of the tank. As fot the Rio, i couldnt find any epoxy or silicone that would set in under 24 hours so i used a plasic knife and melted it down into the hole to seal it. I put it back into the sump and had to bang it a few times to get it started, but its running for now. I looking into a Magdrive pump, by then end of the week at the latest.