I will be converting my 540 planted Discus tank to a Reef tank soon. I would like some advice on peoples sump sysyems for large tanks. I like the idea of the large rubbermaid 100 gallon bins if they work? Sumps will be in the basement so there will be a 15' head. I will use a deltec skimmer and phos reacter for main filters and would like a refugium. Please advise, would love to see what others have done with this type of set-up.