Well I finally got my new sump to replace my ehem white trash kiddie pool. I found an 85 gallon horse water trough. It had a copper drainage fitting so I took some pvp cement to cover it up and to insulate it. Im a firm believer in having a larger sump than display tank. I have a sessile worm plague in my system that I actually welcome. Most people dont like them but their filter feeders none the less and reef builders. I had them in my old system and in large numbers they litterally made new pieces of live rock. I placed a 150 watt 10000k MH over the sump to promote any algae to grow in the sump rather than the display.