When I got my 20v, it was clean as with red coolent inside
then i switched from red coolent to green as it was more readily available to buy
I mixed it with distilled water at first.... then toped it up with tap water (ran out of distilled)
after a few weeks when i opened the cooling system the water wasn't green it came out brown as... and there was rusty gunk everywhere.
What did i do wrong?