My question is more about how long I have to keep the shock levels up. I know it's 'until the algae is gone', but wondering about a time line?
Pulled my solar blanket off on Sunday and found algae stuck to the bottom. Not sure what kind it was, but that's the only place. There were no floating pools of algae or anything like others have described, but probably 70% of the bottom of my pool was black.
Read all the articles, did everything as per the book and it's no Wednesday. There is some improvement, but is this going to take weeks?
FC: maintaining around 20, drops to 17 or so over night, back up to 20, drops to 15 during the day back to 20
PH: brought to 7.2ish before this process
CH: not sure
Using Pool Boss Liquid Chlorine (on my 3rd case now....) to bring up to shock levels and brush it twice a day with a brush that is ~1 month old.
Thanks to anyone for the advice or help.