Decided to do my own Feser One F1 UV Blue experiment.
Loop was originally running with Di-water and 4 drops of PT Nuke.
Flushed loop with tap water then flushed loop with 4 gallons of Di-water.
Drained all components then added little less than a liter of Feser One Premix to the loop. No additional additives.
Here are my results after only 1 week of the machine running 24/7 at stock clocks.
Going back to Di-Water and PT Nuke.