I bought some tadpoles online. Not sure what kind they are, it was a mixture. Anyways, I'm in zone 6A and it's time to start thinking about getting ready for winter. They do not have their legs yet, and I'm concerned. I got an aquarium at a flea market thinking that maybe I should bring them in for the winter. I can keep the aquarium upstairs heated or in the basement where it doesn't go below 40 degrees. Anyone here have any ideas? Thanks!