It's not calcium deposits. And the blocks aren't "discolored". Both are corrosion.
The stuff in the radiator and fittings is oxidized aluminum. The paint bubbles bulging out of the radiator is the radiator getting ready to spring a leak (exfoliation).
The black and green on the blocks is oxidized copper of various alloys (galvanic corrosion and concentration cell corrosion).
The blocks can be cleaned. Personally, I would clean the copper blocks by hand with mild soap, a plastic brush, and water. Vinegar or Ketchup will make the blocks look cleaner and shine a lot more, but will cause the blocks to corrode again even faster in the future due to concentration cell corrosion at the boundaries. Do NOT clean the blocks with a steel or aluminum brush or steel wool!!!! If you use an metallic object to clean the blocks, microscopic metal chunks will embed in the blocks and cause rapid intergranular corrosion. Do not use household grade simple green as it will cause corrosion (if you use simple green, use aircraft grade). I would use dish soap.
The radiator should be thrown in the garbage. If you sell that radiator and then it leaks all over someones' computer, they will come knocking on your door and slander your online reputation.
Next time, don't use biocide. There's a huge article with lab tests published by EK regarding the use of biocide -- either in liquid form or as silver kill coils -- in cooling loops and the corrosion which results.
There was another thread a while ago asking about what to use to clean a radiator. Everyone poo-poo'ed my warning about the use of vinegar and said I was a worry-wart. Guess what? His paint started to peel off and the radiator started corroding after using vinegar; just like I had warned.
(Yes, I have taken corrosion identification, prevention, and treatment courses.)
I had originally used tygon tubing, which was clear, and that stuff clouded up within days of installing it, it was bad. Which is why I switched to black tubing. All I changed was the tubing, so I think I may have found the reason for the white calcification. Probably my mix of water and this specific biocide.
It's not calcium. It wasn't ever calcium. The cloudy stuff on your tubing was literally your water cooling components disolving. You should have been immediately alarmed and asked when the tubing first turned cloudy. You could have avoided a lot of damage by correcting the issue early.
post edited by ty_ger07 - 2014/12/05 06:23:52