What type of coolant should I use with the Coolmate 3.5 cooler on the Dynasty 400?

Miller's Low-Conductivity TIG Coolant (Stock No. 043810) is recommended, which contains a base of ethylene glycol and deionized water. It protects against freezing to -38°C and boiling to 108°C, and comes in one-gallon recyclable plastic bottles that must be ordered in quantities of four. (Pages 6, 8)