I did raise this years batch in an aquarium, but my pond was without many predators, and I only needed a few to get me started. Next year will be a different story, and I'm right there with those trying to overwinter a few. Todd O told me about his high electric bills overwintering in his pond, I'm planning a much smaller scale, in the garage or outside shed. I hope we can bounce ideas off each other as time passes, right now, I'm looking for anything that's roughly the size of a pool table and can hold water. I will probably get my heat from solar panels and batteries since I already use them to irrigate my fall food plots for deer.