Well I just bought a little ~2" Alligator snapper. I've got him in a 10 gallon but it seems like an awfully big tank for such a little dude, so I'm wondering if there are any good tankmates that get along with an Alligator snapper?
few things to clear up about alligator snappers. they rarely swim they prefer to walk along the bottom (when they get big and weight about 100lbs it gets hard to swim). i grew up in mississippi and had a large pond that we owned and have been around alligator snappers all my life. just wait until that little 1" darling has a shell thats bigger than a trash can lid youll be in for a suprise. it is possible to keep alligator snappers with crocodiles etc. but this debate is very similar to the one about what you can keep with piranhas generally nothing but sometimes you get lucky.
Do not put other types of turtles in there with him/her. If you do he/she will chip pieces of the other turtles shell off, and if he/she has a chance sometimes even eat them in only a few bites, or whole. Once I put a red eared slider with a alligator snapping turtle I had (I didn't know much about turtles then) and the next few days it was fine until I had looked down at the red eared slider and noticed it a chip of its shell had been torn off and was bleeding. I took the slider out of the tank and had put it in a different (smaller) tank. It all surprised me a lot because they were both baby turtles. Even the alligator snapping turtle. It still had managed to rip a piece of the other turtles shell off! I never knew alligator snapping turtles could be so strong even as babies.