Liquid custom loop possible Corrosion?

[nicklog]

Hello guys once more
Im running my new build and new loop for about a month more or less and I'll show you in the pictures below 2 photos before and now

That was when I first built it

Thats how it became after a few weeks (Now)

As coolant I changed it to a Mayhems Ultra Pure H2O and was planning to add biocide and inhibitor after a while (after following the advice of some people)
Could someone tell me any ideas what could that be? Corrosion? How did it happen, What caused it, and what are the effects of it on my system?

EDIT: Temperatures are great (i could even say better than before, i get lower temps on my overclocked R7 2700X @4.2 , than the temps on stock settings when the liquid was fine lol)

Thanks in advance
Nick

 

[nicklog]

Thanks for your reply.
Please dont get me wrong I didn't mention that as it was the fault of the ones who gave me the advice or something.
Yeah your advice was that I can delay it a few days but I kept it a lot more because of many reasons. Computer wasnt working for many days and silly me was thinking that it's not gonna be a problem but.. anyway.
I opened up the loop drained that beautiful green shaded water and as much I can see no sign of corrosion or any other crap whatsoever. Could it be (lucky me) only on the water? Or is there definitely something wrong inside in some parts that I cant see?

And how should I flush the rad and blocks do you think? Just distilled plenty of distilled water ? Cause I read some stuff for vinegar / soda etc and I'm not quite sure.
Thanks in advance
Nick

 

[nicklog]

Will do thanks for your advice.

Regarding your side note a white red (black) scheme is what I'm having the purple ones are changing every few secs your just got them in both photos by luck lol.
The blue fan is annoying af(it came with the case) I'm trying to find thermaltake's 140 trio rgb fan but cant find any

Thanks again

 

[nicklog]

Thank you very much everyone for your help