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I am quoting this from a guide on water cooling for this forum please read it carefully:

Additives, Corrosion and the Unknown

Almost all seasoned watercooling veterans will tell you to use only distilled water and either a biocide (such as PTNuke or similar) or a KillCoil...or both. A killcoil is a coil of .9999 pure silver that you drop into your reservoir to inhibit growth of algae and other critters. Most will highly advise against using premixes; some of these even precipitate out and can clog your blocks (FeserOne has a nasty reputation of doing just this).

First, a few things we need to add as a disclaimer, specifically aimed toward owners of EK nickel plated...

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I am quoting this from a guide on water cooling for this forum please read it carefully:

Additives, Corrosion and the Unknown

Almost all seasoned watercooling veterans will tell you to use only distilled water and either a biocide (such as PTNuke or similar) or a KillCoil...or both. A killcoil is a coil of .9999 pure silver that you drop into your reservoir to inhibit growth of algae and other critters. Most will highly advise against using premixes; some of these even precipitate out and can clog your blocks (FeserOne has a nasty reputation of doing just this).

First, a few things we need to add as a disclaimer, specifically aimed toward owners of EK nickel plated blocks; be aware that PTNuke Cu solution and silver killcoils *may* cause some nickel corrosion on some EK block models and will likely void the end-user warranty for repair or replacement. (per EK's customer support)

Quote:
All blocks bases are made of electrolytic copper.
Nickel plated blocks are milled of copper and then plated with fine thin layer of nickel.

When cleaning blocks please do not use any aggressive chemicals (neither vinegar) or rough materials as you may damage block and void warranty.

Using corrosion inhibitors is highly recommended as nickel plating does not prevent corrosion of metals when environment for galvanic effect is created (mixed metal,...).
Please note also that due to presence of UV additives and other chemicals nickel layer may also become discolored/stained over time period.

This also is loosely applied to using a killcoil and PTNuke (copper sulfate solution)- these can cause unwanted chipping, staining or corrosion when used with EK nickel plated blocks. While this typically infers the older versions (newer versions 'shouldn't' have the corrosion problems), they generally have been concluding that silver killcoils and PTNuke Cu solution in distilled is causing some of these issues. This, however, cannot be completely confirmed. Just a bit of info for everyone.

That said:

For Branded PC Coolent:
http://www.frozencpu.com/cat/l2/g30/c337/list/p1/Liquid_Cooling-Coolant_-_Brand.html

For Coolent Additives:
http://www.frozencpu.com/cat/l2/g30/c103/list/p1/Liquid_Cooling-Coolant_Additives.html

Link to Walkthrough were I quoted from:
http://www.tomshardware.com/forum/277130-29-read-first-watercooling-sticky

Hope this helps, remember to select your best answer so others may learn from this guide, Thanks.
 
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