Clear coolant turned blue?

Soldato
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Well, I didn't take a photo bit the litmus paper basically showed that coolant is alkaline (or something weird due to the anti-corrosives...). Both test mixes with coolant came out pH 8, and the distilled water samples were both pH 7.

I wonder if neutralising the fluid will make the colour go away?
 
Soldato
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When I clean my rads with vinegar, the water turns faint blue like that. How did you prep/clean your rad?
Yep, I cleaned mine with hot water, then dilute vinegar which went blue ish, then a few flushes of water. But it ran clear then, and the loop was run for a week with distilled water and didn't turn blue. I'm stumped, need to email Alphacool :confused:
 
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