I have a rack system for my BP's with heat tape along the back 1/3 of the tub kept at 90 degrees. Even with that the tubs are only around 81 degrees. Room temp is typically 72 degrees. How can I get the tub temps up without running a space heater constantly which I feel is dangerous. Are the breeders running the large facilities heating the entire facility? or what is their secret to keeping the proper temp in large racks?? Thanks for any insight.