Greenish Tint/Murky Water

[turok_tt]

Hey everyone, just wanted to seek your advice as I have been out of the watercooling gig for a few years now. I have an older rig that uses the following components:

1. Koolance i380 waterblock (nickel plated)
2. Alphacool triple rad monsta
3. EK reservoir with Laing D5 Vario pump
4. Mayhem white absorbent tubing
5. Mayhem XT-1 Nuke clear coolant (100ml coolant to 900ml distilled water)
6. Bitspower fittings

I have a single loop from CPU block to radiator to pump. I drained the loop completely and used vinegar/distilled water (30:70) to rinse and clean out my radiator for several hours and then flushed it all out with a few rounds of distilled water ensuring to remove all of the vinegar/distilled water solution. I then used Mayhem XT-1 clear coolant mixed with distilled water to fill in my loop again. Immediately, I can see that the water is very murky with a slight greenish tint. I think the coolant is causing the metals to react or is reacting with the metals itself but I don't know why. The XT-1 nuke is supposed to be compatible with copper and nickel plated and I'm not using any aluminum in my loop.

Here is a picture of it:

Any ideas why this is happening?

 

[turok_tt]

Here is an update. After disassembling my entire system, here are some pictures. I did find some rusting (??maybe this is just the bare copper underneath??) in the radiator threads and on the Bitspower barbs (inside the barb and on the threads as well) and I'm not sure if this is the issue causing the murky water. I basically took these pictures of the radiator, waterblock and barbs/fittings right after I disassembled the system (without cleaning) to examine the parts:

 

[n0ns3ns3]

it's called corrosion XD if those parts were not in use for some time, a bit more aggressive cleaning might be required.
for the CPU block microfins cleaning, just use some toothbrush with toothpaste. the rest will have to go through few flushes until all gunk comes out. there is nothing to worry about, you can use distilled water for cleaning. fill the loop, let it run for few days, flash it. repeat until the liquid remains clear for couple of weeks. then use your preferred coolant