sleons
Member
I have two pumps, a bottom and top return pump. I think the LFS may have over sold me on these becuase the top return is about 25% open and the botton is about 60%. I have yet to intoduce corral into the tank but I thouight they required current. My bottom return is 1 inch PVC accross the bottom and there are some sand holes but NO sand blowing. It does appear that the BT is seeking selter from the current while there is a hole in the rock giving it light. Conditions could change but I guess that is where it stays for now.