Forgive me if this is addressed elsewhere, my searches regarding sodium all came up with posts about SWG pools. This is a two-part question:
1. I'm going to be out of town for two weeks, and I'm going to have to revert to trichlor tabs for the sake of the person who will be taking care of the house while I'm gone. I've been running numbers on Poolmath, and i'd love it if someone could double check my math: it seems I should expect the CYA in my 22k gallon pool to rise 1.5 ppm for every 8 oz trichlor tablet they add. That means that for every tablet that's added to my pool, I'll need to replace 440 gallons of water in my pool when I get back if I want to stay around my current CYA level. Does that sound correct?
2. That got me thinking about all the bleach I dump in my pool. Wouldn't 8.25% sodium hypochlorite add salt to my pool every time I use it? How do I measure the salinity of my pool, and at what levels should I be worried about replacing water?