On the pool math app it shows range of AL @ 80-120
However, in one of your tutorials on SWG's , it's states that 60 is ok. What's correct? Also, in the SWG tutorial it shows 70-80 as the cya level while the pool math shows it should be 40-80. My Hayward Aqua rite says cya should be 40. Now I'm confused. What gives?