I had him for about 3 weeks now. He was used to goldfish but I got him on shrimp/smelt and will bring in other meaty foods like earthworms and crawfish etc. He is a foot long. Not an overly active fish so they can be kept in tanks smaller than their size would suggest. He is actually in a 56 gallon. They hangout in weird angles especially when stalking prey. I keep him in a planted aquarium and may put in a few fish that he can't swallow such as an adult angel. Anyone else have experience?