1. 0.5l of metanol
2. 0.3l of concentrated antifreeze for corrosion protection.
3. 1.5-2.0l of distilled deionized water
4. 5ml of my favorite biocide for germ protection (viridis nittens - that's in latin and I do not know if you have that in your place, but those 5ml of 1% of it in ethyl alcohol solution have my 3l color bright green

I use EHEIM 1250 pump, 1/2 tubing (think it's vynil) and a 40x60cm full copper automotive radiator (it IS expensive... ah.... grrrrrrrrrrr...)
As for now I have my P4 Northwood 2.4C@3.0GHz at 1.6V at 34C with passive cooling and no case fan or fan on the rad, system temps are on par.... yeah, it IS hot here already...

It is my first attempt and I already see places for improvement.
now enjoy the photos:
