ok so im a river near my house and i think how cool would it be to make a river but smaller. So i was thinking (not good) i take several tubs cut off 75% of them add sand for bottom and banks then put a pump at in and the intake on one side and the outtake on the other. Then i can add water so now i have a current. oops forgot to say what i want to do with the tubs. SO for the tubs take somthing melt the sides together and sand it down. After i have the current then ill add fish like livebearers mostly maybe a school of corys (ideas for fish to stock will help) I want this to be more like a stream. But i can add frogs and other critters (advice on them to), plants and just mainly a self-sustaining ecosystem where all i need to do is feed them and watch (of course ill take care of the fish like they where in an aquarium) Just the only thing i would have to replace is the frogs or other critters. I would like more ideas on how to go thro with my plan. Ugh its eating me alive!!! This would be so cool. Also the stream is going in the house.