K
KernelCrush
Last weekend I recirculated a gallon of vinegar 5% thru the chiller occasionally closing both in and out valves to capture the vinegar inside for a few minutes. Then recirc some more. repeat. did this for about an hour kept getting blue/green water after changing to fresh vinegar. Got more vinegar this week and running it again, same results only lighter color. Is the blue green color indicating its still cleaning or am I eating copper? I have used this method before and it never took more than a couple gallons to clear.