I just finished buying a new 30g (well, actually, 29.5) tank on ebay. I'm picking it up this Wednesday. Yipee!!! I'm so excited! It was pretty cheap and comes with the filter, lighting, and heater, so I now get to go and buy the decorations! Now I'm just trying to decide what fish I want to get. Once cycled, I'll be transfering my two female swordtails from their smaller tank to the new tank and probably getting a few more, but I definately want to get some bottom feeders and maybe a nice centerpiece fish as well. Is 30g big enough for a red-tailed shark?