Can I mix DI resin?

[SaltedReefer]

I recently bought a new bag of DI resin and it's time for a refill. The new stuff is color changing and the old stuff is not. Can I use what's left of the old stuff and them too off with the new resin?

 

[NanaReefer]

I would :) Waste not want not-lol.

 

[AZDesertRat]

How old is the older resin and was it stored properly to maintain freshness?
If it is 6 months or older or was not sealed up, preferrably in zip loc bags with a little RO/DI to keep it damp and stored in the refrigerator or better yet sealed with a seal a meal vacuum device then I might consider tossing it and using only the fresh resin. Make sure you reseal the bag once opened and store it in the frig to keep it fresh. Back when I was using bulk resin I would divy it up in 20 oz portions and vacuum seal them separately so they stayed fresher.