Can you check the level of protection of Dexcool with a regular anti-freeze tester? If so, should I have two testers to prevent any cross contamination ?

If Dexcool cannot be tested with a regular tester, how is the level of protection tested?

you can go to your atuoaprts store and get a checker fotr dexcool type fluids that use propylene glycol, instead of the old green ethylene glycol. i know they have em at napa- jon