I bought a pair of baby tiger muskies last week. They were both about 3"-4". I had them in a 55 w/ some baby teminsis and a couple of baby albino bichers. After a few days the larger grew quite a bit. I was feeding them roseys. He ended up eating 2 of my peacocks. So I moved them to 30 by themselves. They have quite an appetite. Last night I walked into my fish room for their night feeding, and there was the smaller muskie sideways in the larger one mouth. He was trying to kill him. I tried catch him and save the lil guy, but no such luck. I think he knew what I was trying to do. He immediately started swallowing the little one. So now I have one tiger muskie. He has grown at least an inch already. They are beautiful. I know how big they get. He will eventually go into my outdoor pond/ the pool has been converted. The old lady wasn't too happy about this but she understands... "Fish aren't our whole life, but make our lives whole." I forget whose signature that is but it is so true. Lesson Learned... Tiger muskies are awesome, just don't put them with any fish that could be a meal.