I am keeping the betta in the 55g b/c he seems very happy in there. I do plan on getting rid of all the sharks, and since my bf likes them and is upset that I am getting rid of them, I am going to find out if those glass catfish will be compatible with the inhabitants of my tank b/c he really likes them. I will get a few more blackskirt tetras also. If I'm lucky my LFS will trade me for the sharks. That would be nice.