Insulate the rack.. I have a back heated hatchling rack and I covered the entire back with that flexible silver colored insulation sheets. Just cut it to fit and taped it all around the sides to help hold the heat in. Also, make sure the rack is sitting up off the cold floor. If it isn't on casters, get some 4x4's and lay them on the floor and put the rack on these. A layer of insulation around the sides will help greatly also. Really the temp it is at right now is good but any lower might be risky so you want to prevent any major drops.


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