I have my heaters in the skimmer chamber along the back wall. I used a dremmel and cut the PVC lid to allow the wires to have an exit hole. As @UNS_Brandon said, it makes easy access for the skimmer cup, and keeps the heater out of the wayTwo BRS heaters in a magnet mount, waiting for the reef mat to show up so I could see if there's going to be space to put it in the filter chamber. Thinking of doing the filter chamber because it's going to have an open top so the power cables come out. If I put it in the sump chamber, I would need to dremel out part of the sump lid to give the cables a space to come through.![]()

