Yep, was supposed to have a few guesses that where way off though... You guys got it so fast..
Well played.
He's probably the only 8 inch black crappie I've seen in that pond, there are only 2 very small 3 inch ones that I've seen other than that, it's now in my fish tank and doing very well. Surprised it adjusted to the high ammonia water so quickly.
You could have cycled the tank. I just think that they will outgrow that tank VERY quickly. I know nothing about natives. I don't know how large they get, but I think, and so do you, that it will get bigger. I hope you either get a larger tank, and get some fish to feed your moniter. SOrry for the rude things we said in the previous post, but we just aren't use to people keeping fish like you do. Oh and crawdads need land and water. I hope part of you aquarium has land, like one built for a turtle, they like to dig through dirt.