Re Black Algae:
Will scrubbing the spots with a Chlorine Tab really help? Just got back from vacation and black algae that was there a month ago is still there. Treated with algaecide just before we left but obviously didn't help.
Total Chlorine 0.5
Free Chlorine 0.5
Added 3 bags of shock this afternoon and have been brushing every hour but not sure if the scrubbing with a tab does anything?
Also there is still an abundance of dirt at the bottom of the pool. Was vacuuming, brushing, backwashing etc for several weeks before we left and couldn't shift it and problem is still there. Why does dirt gather at the bottom? We have a pop up system that has never worked great but it's never been this bad. Replaced the cog system before we left and it doesn't appear blocked but it seems to just get jammed on one station every time. Pump is new and the pressure is great but I just can't shift the dirt.
Any tips would be awesome!
(We live in Arizona so it is dusty but like I said it's never been this bad!)