Ok, I decided I do really just want a 5ga tank for a few months. I dont want to go all out an buy a big tank and spend 500 bucks an found out I either dont like SW and it's just to much for me, or if I can't get the hang of it. So I just want a small live rock, the sand, and shrimp, maybe something else like shrimp but I doubt it, no fish! make this just a cool little tank for my entertainment area of my apartment. I kinda wanted 3 shrimp, is that too many? if not what else may I add?Also what size live rock should I get an where can I find one that small, 20lbs I would say is TOO much