First off I do have a question but a little back story first. My daughter had some friends over and since we like to entertain the parents "pool owners themselves" stayed. Both made comments on how clear the pool was. I told them that I use bleach to chlorinate and what I target my FC at. The wife was like "that's too high and it will eat your skin off" and did not swim. Personally I did not care and am not one to argue a losing battle. He and his daughter did swim and his first comment was that he could read a book under water if he could hold his breath long enough. So after that the questions started flying "away from his wife". He told me that his maintenance was tabs in the floater and something called no mor problems. I think the light bulb lit when he said the pool store sold him some TA up for $12.99 and that he could have used 49 cent per pound walmart baking soda. I think I may have a convert to the clear side.
Question: I maybe wrong but I think I have seen over the years that the buffering is something like 7.2% per 10ppm of CYA. Is that right or wrong and is there a linear % that is used. I know it might not be that simple and without diving too deep. Is there a simple layman's way of explaining the FC/CYA relationship?