Well, I have some bad news... I was home for a visit this weekend and I shuffled some fish around. I moved walter and the big Apure cat into my 220 to give them some more space, and to free up my 120 for my oscar. Shortly after moving, Walter rolled on his side, and several hours later was dead. I'm not sure what the cause was, as he seemed OK after moving him, but I guess it makes no difference one way or the other. I think the apure attacked him and he bolted, but I don't know for sure. Anyways, Walter is no more. I really don't know how I feel about getting another one and living through all the growing pains again just to get something in that 600gl tank - I'll have to see how it goes. I still want to set it up - I might put rays in it, if I can get them up north here.