I know my coolant's conductive, but that really dosen't bother me (I forgot to attach my return line prior to leak testing - Ops Lost a few things)... I usually test my loops for a few hours prior to powering up the rest of my system (I'm kind of impatient)... The coolant I use works great and it keeps all of my components free from bacteria and corrosion (Tried many of the other brands but most of them leave a heavy residue. I'm looking for something that'll add a little spice to my current coolant without creating toxic fumes or loss of corrosion protection...

A slight glow looks good IMO...