Best way to increase CH?

[bostonpool]

So I've got my FC dialed in at last thanks to this site! Many Thanks!

Now, for the first time my CH has dipped a bit low. I'm currently at 325 with target for a Gunite Pool with SWG of 350-450

I'd like to increase it to 400 just to keep it in the middle.

I've seen Balance Pak 300 recommended or else calcium chloride. Is Balance Pak acceptable? Or does it contain more unwanted ingredients that I will regret?

Where can I get calcium chloride?

 

[Richard320]

Balance Pak will be the right stuff, but it will be way overpriced.

Where you live, stores may still have some Ice Melt in the warehouse. See Pool School - Recommended Pool Chemicals for brand names