The regular PT Nuke may be better with a dye ...Originally Posted by HamidFULL
from the description for the PHN version:
Primarily geared toward systems running straight distilled water, Nuke -PHN is not acidic and will not drop your coolant's pH, making it ideal for use in poorly buffered coolants and situations where corrosion is a concern (since many corrosion inhibitors are optimized for use within a pH range of 7-8.5). However, we do not recommend the use of Nuke -PHN with most "pre-mixed PC coolants" and dyes (though, our testing indicates that there may be no compatibility issue with Feser's UV dyes).
Distilled water + PT Nuke -PHN + some of 
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