thanks for the advice guys. Unfortunately I don't think matts would be the best option for me and in a 100 year old farmhouse basement, getting the room temperature up would cost me over $100 a month just in heat let alone drywall and insulating the brick walls -but I did toy with that idea in the beginning of setting it up. I was looking at submersible heaters for aquariums, but i was hard pressed to find one without lights on it or that would fit flat in a tank, but I guess I'll just have to look harder.