Hi Mick,
You say that too much biocide can be a cause of this problem. This stuff like Pt Nuke yes? As I've only used a silver kill coil in my system and as far as I'm aware it shouldn't change the pH of the water.
Hi there yeh silver kill coil shouldn't make a ounce of difference unless it was washed in acid and not cleaned properly (which is very rare). That's why i use lemons and ultra pure water to clean the coils i make as it makes it easy to remove the lemon afterwards. As you can see when you poured the dye in a glass it works and if you left the glass on the side you'll see it will still be the same a few days later, some thing in your loop is causing the issue hence why i would say it may be the rad or some thing else but not 100% sure unless i analyse the liquids.
that's the problem with water cooling there are lots of people suggesting many things but with out the liquids in there hands and the proper test equipment then 99.99% the time its pure speculation.
to much effort is put on blaming some thing that is not at fault in this game and its happens so many times is defies disbelief it self.
As for my biocide yeh its the same as PT nuke except a hell of a lot stronger. This stuff is the same used in fountains to kill every thing as in its used as what is called a Shock treatment as it can clean a fountain in hours its that strong. We have to water it down because in its pure form it would just be overwhelming in a water cooling loop.
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