Thank you Richard for another great explanation. I read the links and have the following dumb questions with probably more to follow.
1. If a pool had high CYA levels at the end of the season, it seems that the feasiblility of reducing those levels over the off season is reasonable if the chlorine levels are below breakpoint or 0 FC. This could occur without any significant clarity issues during the conversion of CYA to ammonia but would create additional chlorine demand to correct upon preparing the pool for opening or preventing an accelerated algea bloom, whichever came first? It wasn't phrased as a question but meant to be.
2. How significant is water temperature in question #1
3. Under what conditions can ozone deplete FC levels?
1. If a pool had high CYA levels at the end of the season, it seems that the feasiblility of reducing those levels over the off season is reasonable if the chlorine levels are below breakpoint or 0 FC. This could occur without any significant clarity issues during the conversion of CYA to ammonia but would create additional chlorine demand to correct upon preparing the pool for opening or preventing an accelerated algea bloom, whichever came first? It wasn't phrased as a question but meant to be.
2. How significant is water temperature in question #1
3. Under what conditions can ozone deplete FC levels?