soft shell

I have a 40 gallon breeder tank I am going to use for my red ear slider and bottom dwelling turtle as a temporary tank for a good while since there small and I want to get a softshell or musk turtles for it too eventually. But I need fish suggestion on what fish and clean up crew to put in it!

Had the opportunity to pick up a 4" soft shell yesterday which I've been wanting ever since I watched the cartoon Gumball. In memory of the greatest kid show geared towards adult jokes I even named the little guy E.T. (Evil Turtle). He's now in a 40g breeder with some pieces of wood to bask on...