How about pure distilled for a copper only rig?
I've run my system for 18 months with distilled and 7% antifreeze. Its time to change the water due to bacteria. I must say that I dont like the green colour of the antifreeze. when I first put it in it was luminous yellow, but then it became a crappy dull green colour.
I'd prefer to run plain distilled and NOTHING ELSE. My rig is just Copper and tin solder. I seem to recall some experiment where people put metal in distilled water and the water ate it. I cant remember if it was to demonstrate galvanic corrosion or if the pieces of metal were in their own containers.
I've searched the forums and cant find anyone talking about Pure Distilled on its own.
Other than that i'm thinking of just putting a tiny bit of anti-freeze in, just a few spoon fulls worth for good luck with the tin and copper and water possibly eating metal.
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