Quote Originally Posted by larryd23 View Post
My advice is to try to reduce heat loss. Try covering one or more sides of your cage with foam insulation and see if that helps.
If you don't have foam insulation on hand, a small blanket or large towel will work if you want to test this solution.

Some of my racks are in cooler rooms during the winter. I've covered them with a light blanket when the ambient room temp can drop down to 70*F and it does help bump up the ambient temp in the tubs.