I live in Mid-Western Ontario, and today it is a balmy 13 C or 55 F. We finally got the pool up and running about 3 weeks ago. My CYA reading is around 35 ppm. I used the 2 sock method to dissolve 1KG of the dry CYA. It seemed to take forever to dissolve. I know with a SWG I should have a CYA level of 70ppm, although I am not sure why so high, but that's what you guys are telling us to do here. My question is, being that it is so late in the season, is there any reason to raise this CYA level when we will be closing the pool in a month or so?