In case you hadn't figured out by the topic, I'm new to saltwater. I'm considering starting up a 120 gallon reef, and have been looking around for information, and stumbled on a few forums, this one seems 'the best' (yeah, that was your basic 'gratuitous' comment to get help...). I've seen lots of stuff about the setup of reef tanks, and am a bit confused, and can't seem to find the 'simple answers' I'm looking for. Basically, how are those 3 related, are they somehow the same (don't think so), can they all be hooked up in a reef setup and how, do I need them all, etc. Would/should/how would I also hook up a protein skimmer and a UV sterilizer. I've been trying to find a basic diagram of how they would all hook together, and can't seem to find anything. Maybe I just haven't looked hard enough, eh?