I am a fan of distilled water, used it in my last 2 builds years ago. I also used Glycol and Antifreeze and some UV dye. Always had to change the water after a couple months.

I have been reading here about just distilled water and a kill coil. Instead of using a coil would Bitspower True Silver barbs and fittings work?

Barbs: http://www.sidewindercomputers.com/big1trsi1fi.html

Compression Fittings: http://www.sidewindercomputers.com/bitrsi1cofif.html

Also

What are people using to combat multiple medals? The loop I am thinking of will have copper and nickel and what ever pump(s) I decide on.