Awesome!! I'm in central ohio too..........maybe you should come to my house and help me set some up.
But seriously, what a cool idea! You mean, you move your indoor aquarium fish out to the barrels in the summer? Do the barrels not get too hot? And, how do you keep predators from eating your fish? Even if I didn't put fish in them, it sure would be cool to set some up just with plants. I've been wanting to put in a water garden but I'm afraid of the legalities (I live in a development, there are kids, what if one fell in or something.........). That and OMG what a lot of work to dig........ A barrel pond sounds perfect.