Whatever you do when changing brands or types of coolant be sure and do a complete flush,
especially if going to one of the long life coolants.
I knew that Dex-Cool was not compatible with others,
did not realize how incompatible some of the others are.
But I got a lesson on that;

The first picture is my water pump housing, the second is the old and new plastic water pump impeller.
The material build up was a hard waxy substance with some gritty feeling stuff mixed in.
So if you are going to go with a long life or an HOAT or OAT or some other coolant,
I would be sure to flush it repeatedly with tap water then with my hard water another or two with distilled.
I run a 60/40 mix a bit heavier then the usual 50/50, so I either buy concentrated and add distilled water or
frequently because its easier I will get several jugs of the premixed and a jug of concentrate.
I'll fill most of the way with mixed then give it a shot of concentrated.