Does anyone have any good ideas for keeping heat in my tank? I've brought my tank to work with me and the cottage I have rented has very poor insulation and expensive baseboard heaters. Im only in the process of cycling the tank but every morning I go to check and can't it up over 74⁰. The external walls of the house are quite cold so I was thinking possibly a foam cardboard background against the wall. I tend to sleep better when it's cooler so I have raised the temp on the house slightly but not enough that I think it will make a difference.