What you really need is a solar powered micro ground source geothermal
unit for your winddow. A little teeny tiny one.
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Nah, someone needs to invent a heat TAPE for those with bowls or tanks in a
row. The reptile folks would probably buy it as well as the fish people. I
could be sold in several lengths to suit different needs.

Well in theory you just need a piece of stuff that at the
bottom is the ssame shape as the ratcage heater tape and the
top part morphs into a shabe that acts as a base for the bowls
or whatever.

--
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