Waterless Coolant systems...Good or Bad?

[Billdozer2]

Just curious, can you mix any of the above coolants? Reason I am asking is because I was running low on coolant one day and the truck stop only had "Peak Fleet Charge Coolant" (which is the pink stuff) and the last time the coolant was flushed, my company put "Delo Extended Life Coolant" (which is red) in the cooling system. I read the back of the Peak stuff and it said it passed Cummins parameters blah-blah-blah. Figured it was ok. I'm not having any issues, but just curious if I may have created a toxic death liquid for my CM2250.