I use heat tape for my racks, RHP's for the cages. I choose to use back heat for the racks, though, as I feel it radiates heat more evenly that way. Very gradual dissipation from about 90F on the warm side down to the mid-70's on the cool side.
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"He who would stifle debate rather than engage in it, does so at the expense of his integrity and credibility"

Mike Curtin

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