Here's some updated info as best I remember it from the guys who work on SWCGs.
1) Pool maintenance is pool maintenance. The SWCG makes things easier and SOME recommended numbers change, but all in all it's the same.
2) Shocking is what you do when you have a problem or suspect you have a problem. Most systems can gen higher levels of chlorine, but (and I'm guessing here), not enough to clean up a major algae bloom.
3) Bleach/liquid chlorine is the ideal adjunct method for adding chlorine. Bleach is made from salt-water, ie brine, and you had to add salt to the pool for the SWCG to work.
4) Manufacturers generally prefer higher levels of stabilizer (CYA) than expected. 70-80ppm is pretty normal.
5) according to Chem_Geek, our resident chemistry geek (get it?) you need to keep FC at 5% of cya, so that's 3ppm when CYA=60ppm and 4ppm when CYA=80. It's also much lower than the Best Guess table, but the SWCG puts a steady flow of chlorine into the water.
6) According to our other pros, a low Total Alkalinity works very well. 60-80ppm is what they tell us, far lower than the 80/90 to 120/130. I'm guessing it has to do with the tendency many SWCGs have to raise pH. A lower T/A may buffer that.
7) for reasons I don't understand, even a vinyl pool may need Calcium with a SWCG.
Hope this helps.
Carl
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