What water?

[Krusty]

Ok, I have a copper water block and a copper radiator.

I just custom made a reservior to fit my bilge pump out of a little rubbermaid container.

The bilge pump is made mostly out of ABS plastic.

Soo...what should I use in the way of water? I was planning on using distilled with water wetter, but I have heard little bits of information about water wetter and plastics not mixing very well together. I'm not planning on hitting sub zero temps, but should I try for a methanol/water mixture if that won't eat away at my reservior? Is there another combination I should try?

[Diggrr]

An annecdotal answer, as most will be.
I use 10cc antifreeze per liter of distilled water. No corrosion to date, and the hoses/pump are fine.

[Iron Hawk]

Plain distilled water will probably be fine, but I would add water wetter. remember that you dont need to put as much water wetter in as the bottle says, because watter wetter is designed for car cooling systems, not computer cooling. Just be sure to check your plastic parts for wear, and if there is a problem switch to something else.

-Iron Hawk