I was thinking of getting my kid his own tank for x-mas from Santa. I was thinking a 29g bio cube because it has all you need to get started and I don't have to mess with a sump setup. I also was thinking of a 45g? bow front for the fact that he could get more of a selection of fish and have more room for corals. The only thing that sucks is I would then have to build a sump buy a skimmer, return pump, power heads, plumbing, lights, and several other things I'm sure. The bio at least has a sump built in with a pump, might have a power head and a skimmer is cheaper then ones for a bigger tank. The lights are decent and you can get upgrades for less then a 4' light. They also seem easier to take care of. Santa brought a 125g last year that I have taken over, with the exception of a few fish. He's 10yrs old and always had a interest in fish and has wanted corals so I thought this could be his to take care of and buy the items needed to run a tank including buying the livestock. so what's your preferences?