I'm contemplating getting a skimmer rated for way over what my total volume is going to be. Since I'm doing a FOWLR + reef + display fuge, I want something that can SKIM. I'm only going to keep softies and maybe a few LPS in the reef tank. The one I'm looking at is rated for around 500Gl. It's the RLSS 12-u. Any disadvantages to oversizing your skimmer?