A while ago I posted a thread about stocking ideas for a planted 20 gallon high. I got this tank for Christmas, where I put a clown pleco (with dead driftwood, of course), and 3 mollies in it. I was told that this tank was overstocked because mollies get big. Is there really no other option for fish or invertebrates to get in this tank? I wanted to get a couple swordtails, but now I'm rethinking it. Oh, and just one more question.... Why do people always keep bettas in such small tanks?