Greetings. At the start of the pool season my CYA was at a perfect 40. Lately (past month) I've noticed an increase in chlorine demand from my pool. On a hunch I did another CYA test and it literally fell to 10. We have had A LOT of sun this year and hardly any rain. I have had to add water to my pool to keep it at the appropriate level because the sun was just evaporating it like crazy. I know you cannot lose CYA through evap but can you lose it by continuously adding fresh (well) water to the pool?? I really am at a loss on this one. I have some CYA on its way to stop the chlorine bleed. Your thoughts on this are greatly appreciated.