Last year I used the SWG, this year for whatever reason it is not hooked up yet, but obviously there must still be some salt in the water. I had very bad algae when I opened the pool and it took a month to get it clean. I have maintained my levels accurately, the only thing that I know it still too high at 170 is my TA.....I never let my FC go below 4 and yesterday woke up to green around the shaded areas in the pool and it is definitely algae. So my question is, since there is salt in my water, but I am not using the SWG, should I go by the recommend levels of CYA for a vinyl pool with bleach #30-50 which is what I am using or CYA of 70 -80 for a SWG? This may be the problem of getting algae back so soon. I am starting to shock again and need to know which CYA level to shoot for? Thanks a bunch!