Leslie's is where I usually get the R-0014 since my preferred online vendor also doesn't carry it.

I wanted to add a 'heads up' in reference to adding CYA slowly via the skimmer. While it will get transported into the filter eventually it first sits in the pump pot for a while. This might be disconcerting to someone who hasn't used the skimmer method previously.

It takes about 20 minutes for my water flow to clear approximately 1 pound CYA out of the pump pot. I have a 2-speed pump and set it on 'high' when I make this addition.

Just file it away in your 'Oh yeah, didn't I read about this?' memory.