yeah you can, my room in the winter(in the basement) where my rack is has dropped down to 70 for a good week straight and my temps stayed fine with a 4in flex watt running on smaller tubs and 2 running on my 41 qt tubs. i made mine out of melamine, now I'm trashing it and getting a RBI this weekend just because melamine is to heavy and bulk for what i want.
you can try 2 tubs, one summer tub one winter tub, summer has more holes to keep the tubs from over heating, and winter tubs to keep the warm air in, just have to adjust accordingly to keep proper humidity. and all my snakes have never missed a meal during winter. i used belly heat for this reason, and my rack was closed on all 5 sides.
Tom
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