Have a 3 mo old hot spring flair with ace salt system. On initial water fill and was hoping for the 12 month water duration the ace manual suggested. Chemistry well balanced using test strips and water very clear but when I tested cya for the first time now it's at least 150. Surprising because using the salt system I've hardly had to add any Dichlor. I know draining and refilling is the only solution but if water is completely clear is there any downside to running this water a couple months longer. I'm aware that high CYA levels make the FC levels unreliable in the sense that there is a lower proportion of active chlorine. Also what is an optimal CYA range for a salt water hot tub? I can't find that info anywhere. I would think because of much less sun exposure due to cover being close most of the time that it should be lower than for a salt pool. Also with minimal Dichlor input and modest use along with a salt system anyone have any idea how the CYA level got so high? Is it just that time is up at three months rather than 12 months has the ace manual suggests ? Manual silent on cya altogether, wonder why. Also I don't have the liquid chlorine option being it is a spa.