I kept saltwater reefs almost 20 years ago, I'm sure the science/hobby has advanced since then. My fiance recently scored a 46G corner tank/stand/hood, large protein skimmer, LARGE pump, couple powerheads, etc. for $20, and we decided we'd go salt with this one (we have 14 tanks running now, mostly fresh, 2 brackish). The tank is undrilled. Should I drill it and put in an overflow? If not, is it still efficient to run a skimmer box over the side to a sump, or are there better rigs these days. Also included was an Aquaclear 300 that I imagine I could use for a small refugium, or just bio-media, etc. Are fluidized bed filters still suggested? Other suggestions?