I'm trying to keep with a freshwater creekbed theme for my tank, and was thinking adding a crawfish to the tank. First of all, I've always liked those little guys, and secondly I hear they can help keep the tank clean by eating any food off the bottom the turtle may have missed or just been sloppy with.
Has anyone tried this before? How did it work? I figure with them having such a hard shell, they should be pretty protected from the turtle. I'm just not sure how aggressive they will get. The last thing I want is my turtle getting bit up by the crawfish.

