So how come there aren't a LOT of sick people?

[PatL34]

If SWG's constantly generate new chlorine then there should be less need for CYA not more!

Actually you need more! The cell instantaneously generates a high concentration of chlorine that destroys the chloramines AT the cell.

If there was not a high CYA level, most of it would be used up before it got into the pool proper. The alternative would be to run at high chlorinating outputs, resulting in rapid reduction of cell life.

Hope this helps.

Pat