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OK, I will take the light out and deal with that. I should have posted this in my introductory post, in which I describe how we took over caring for our pool in May from a pool care company. We kept having algae problems, just not black algae. Since taking over, we had not been able to...

My test numbers when I started the slam last week were: FC: .5ppm CC; .5ppm pH; 7.5 TA; 70-80 CH; 550 CYA; 30 I have been able to scrape the tops off some of the bigger spots, and they must be black algae, because they are as you describe. The other black spots are like in the pictures; very...

I am currently doing my first ever SLAM on my pool for black algae, and have a few questions. Would adding polyquat help speed up the process? I began last Wednesday night, getting my pool up to the slam level of 12. I have consistently been getting at least 2ppm FC loss during the night...

Thank you Jason. I have read so much about black algae and how it is so awful, and how you never get rid of it completely. Is this true?

Hello everyone: I have been reading a great deal on this site, and just barely started slamming my pool. Here are my pool specs: about 28,000 gallons IG plaster date: 1984 cartridge filter, 520 sq ft, 150 gal/min, model # CCP520 Pentair Pump 2HP 2speed heater mastertemp 400 Pentair spa...