MORRISONSTEEL
Platinum Member
Fully formulated coolants typically do not require a conditioner additive (assuming you use the appropriate one). Conditioner additives are added once you have checked glycol level, inhibiter level, and pH. You can do this with test strips that "most" ag dealers should have. Blindly adding conditioner/inhibitors w/ out testing may lead to coolant gelation. This would typically be something that you would test once a year or so and add as dictated by the test strips. Will still use a refractometer for freeze point testing. The additives have lots of names, conditioner, inhibiter, extender, etc. If you are concerned I would get some test strips and check it out, they will tell you if you need to add anything to it. Good Luck