You may have noticed my posting for the sump size and also mentioning my ugj system. But I figured this would probably be better for starting under a new topic. I have the ugj system built and received my two rio 2100 pumps today. I was looking at them and wondering. Do you use the suction cups to fasten the pump to the glass or does it just rest on the pvc pipe? I have been looking at this and the brackets don't look like they would let me use the suction cups with the way I think my pumps will be setting. Looks like the brackets will be facing up on the pump instead of on the side. My ugj is 1/2" pvc.