You might also consider some sort of method to seal the stainless
steel so that any moisture trapped between the glass and the metal
does not lead to more corrosion. WHat to use? No idea. I would look
at paints FDA approved for cisterns as a place to start.
Also, be very certain that the silicone you use is safe for fish.
Dow's silicone II is supposed to be dangerous, but I have never tried
it. I have had good results using plain old silicone that is FDA
approved for food contact. I find this in the big box hardware
stores.
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