what additives do i put into a water cooled system??

i was just wondering what to put into a water cooled system.. here is a link to the place ill be ordering from so if you could suggest one from here that would be brilliant.

http://www.dangerden.com/store/home.php?cat=11

i was reading how (i forget name for the type of non conductive water) but that by itself does the best job, but if there is a leak i dont want to take a chance of it mucking things up. so in your opinion what is the best choice?

Redline Water Wetter is commonly used as it is non-conductive, reduces galvanic corrosion, and has lubricants and anti-foam additives. MCT works too, and it's listed on the site for $20. That's basically everything you need your fluid to have.

so how much of that stuff do i use and how much distilled water do i use??

and is this stuff ok? Fluid XP+ EXTreme http://www.dangerden.com/store/pro [...] =63&page=1

and if i add this stuff is it ok?? http://www.dangerden.com/store/pro [...] =55&page=1

@ maverick7

1/2 water and 1/2 Anti-Freeze, just like in your car.