Hi XS community,
Im a IT and cooling (especially watercooling) enthusiast, as most of the people that wrote here
Im from Italy, so please sorry for any writing typos and mistakes.

Since 2 years, I can't get rid of watching my watercooling system colouring green, with formation of green/blue films into the tubes and on fittings, o-rings.
This is my actual watercooling system:

Pump: Laing DDC1 Plus T
CPU: Ybris Cooling Eclipse Chrome (chromed copper and brass, delrin)
Northbridge: Ybris Cooling K5 Chipset (copper, plexy top)
VGA: Ybris Cooling K5 VGA (same as chipset)
Southbridge: EK Waterblocks NB/SB4 (copper, plexy)

Radiator 1 : Black Ice GTS 240
Radiator 2 : TFC Single radiator
Radiator 3 : Magicool Single radiator

Reservoir: XSPC Laing Top Reservoir

Tube: PVC Clear (UV reactive) 13/10mm, bought on Aquatuning.de

All the fittings are made of nickel plated brass (compression).

There is no aluminum in the system, never used it in my systems, because I didnt see reason to discover how galvanic corrosion act on my system

So, this is the actual situation:













Is this copper oxide?
To clean my waterblock I used vinegar + salt (with iodine), and then washed for 5mins under hot water and dryed immediately, then washed with deionized/demineralized water.
The blocks were shiny.
On the blocks in the last pictures I used an italian product to clean metals, called Sidol.
Its made of Amonia. Im sure it was cleaned and washed very well, under hot water for 10 mins, and then were washed again with deionized/demineralized water.

The problem could be the water? I discovered recently that water I was buying was containing a bit of parfume.
I changed it with another brand of distilled water.

Or could be cause by solvents of the XSPC reservoir?
The first time I've put some water onto reservoir and I've shaked it, the result was microscopic bubbles forming and an intense smell of solvents inside the reservoir.

By the way, I dont know how to get rid of this problem, It is causing problem to pump, that sometimes stop working because of the deposits.
Maybe the problem its how I clean my watercooling rig.
I read in a thread in this forum that mixing Vinegar + Salt can cause oxidation.

Thanks in advance for your reply, it will be precious for me.