What kind of water?
 

What kind of water should i buy. I am assembling all my stuff tomorrow. I have some Zerex racing stuff to go along with it. Is de-mineralized water in like a 1 gallon milk jug thingy from like wal-mart ok?

you want straight up distilled water.

Distilled or deionised water is what you want.

I'm using the 15% destilled water/Zerex mix with a capful of Algae Killer. Works very well.

cool, thanks guys. Anything else a noob should know? Like do i need to run anything special through my tubes or pump and rad and stuff before i fill'er up and let her rock?

Nope, just fill with water/zerex and get going. You'll need to make sure the pump is primed before powering it on as mag drive pumps don't like being run dry.

It's not a bad idea to flush the system before you run it, because some radiators and tubing have dust and bits of "stuff" in them. It depends upon the type of block you have, though. If you have a waterblock with small restrictions, it could get clogged up by a bit of stuff that wafts through.

Odds are that there won't be anything big enough in there. But, it never hurts.

Definitely flush the rads. There's always some gunk and paint (if they're painted that is) that's caught inside and a few flushes in both directions usually get that out. You don't want anything clogging your loop.
I've personally had something stuck inside one of the BIX rads I bought once, and no amount of flushing was able to get it out. You would shake the rad and could hear that there was something inside. That's an extreme example but goes to emphasise the need for flushing before use.

Well, my rads were just heatercores, which explains (probably) the lack of debris in them. I think most car radiators are flushed prior to being put in boxes. I don't know of any shade tree mechanics that flush heatercores prior to installing them in the cars (but then I only know a couple of mechanics).

My heatercore had plenty of crap floating in it. Gritty like black sandy stuff. It is probably the by-product of soldering. I'd still flush it out completely, you never know...

does zerex affect tygon?

Yeah - but you should call it di-hydrogen oxide :)

In what way? It leaves no residue if that's what you mean.
I am no chemist but let's see... the most commonly used Tygon tubing, with computer water cooling crowd that is, would be R-3603. The name "laboratory & vacuum" sort of hints to a chemically resilient material and that's exactly what the product specs strongly suggest. Here's a quick link to that: http://www.tygon.com/media/documents...3/tygr3603.pdf

Zerex on the other hand is simply a corrosion inhibitor, the most popular being "Racing Supercoolant" which is touted to have better cooling efficiency than your "regular" mix of antifreeze and water.
A link to some info on that : http://www.valvoline.com/zerex/
Long story short, yes, it does, but not in a negative way, so the answer is no! :)
The only visible effect would be color. A girly pink, which may go a long way with chicks. It's a well known fact that a typical Zerex using computer water cooling enthusiast is commonly perceived by women as " more sensitive".

To be strictly accurate you should call it oxygen dihydride ;)