we'll see how the resin lasts now that I made some changes... I may have to sell it off to some locals once I open the big bag.. though my local water does have high amounts of CO2 so it will likely die out at about the 200gal mark, nowhere near as good as yours, az
I have high CO2 thats one of the things that amazes me about Spectrapures resins, they last even with it present.
I was over at their shop week before last and they tell me they are bench testing some even better resins that should las teven longer still!