DI resin colour?

[fkshiu]

Yes, it does. Or more accurately, it's reacting with co2. Don't quote me but I THINK it's still OK to use. It just won't change colour when it is exhausted.

[JOEL]

Hey Mark just keep an eye on your tbs meter if you have one. It seems to tell
me when to change my di resin , tbs levels go up.