Originally Posted by kpoeticg
Mayhems is considered to be the best quality coolant. Especially because of his forum support. You can reach him or one of his employees on OCN or any of the popular forums.
He only sells Concentrate (Premix) and Dye. Any of his Coolant Concentrates (X1, Pastel, XT1, Aurora) have everything you need already in em. He actually advises against adding any type of anti-corrosives or biocides
His Dye's have nothing in them except dye. People use em to alter the color of their coolant, or if they wanna run a loop with just Distilled and add their own biocides and anti-corrosives
If you check out the first post in the Mayhem's Club
thread, there's alot of info about the topic
Aquacomputer, EK, Koolance, Primochill, & Swiftech also make decent premix as well. All of them should contain there own biocides and anti-corrosives. That's the point of using premix
Ice Dragon is another one, but Mayhem's Pastel actually already has Ice Dragon in it