I live in Las Vegas, NV. A very dusty city. My pool is AG, 10,000 gallons, plaster, 12 years old and has a cartridge filter.
I have a small amount of mustard algaecide and and what appears to be dust stains as I brush the steps where it is most prevalent and it does not completely go away. The algaecide first appeared about a month ago in June. I purchased Kemtec Algaecide and used a powder shocker. Brushed the algaecide and everything was fine Then it got really hot (108 degrees) and 2 days ago I noticed some mustard algaecide again. I put some shocker, waited 4 hours, then another treatment of shocker, waited 4 hours, then 2 pounds of muriatic acid waited again and at least 8 oz of Kemtec algaecide.
The water analysis was done at my local pool store. Everything was normal except the alkalinity range was high at 8. Ph was 100 which read as high though the acceptable range is 80-120 ppm. After the analysis, it was suggested I put in another treatment of muriatic acid, 2x, which I did.
The water looks sparkling clean. I just need to clean up the mustard algaecide and make sure it does not return. I read that algaecide is not that effective. I would like your opinion on that also.
I read on another thread that using bleach is a way of getting rid of the algaecide and the dust stains. Do I just purchase bottles of bleach? How much should I use in a 10,000 gallon pool. I also am soaking my baskets in bleach and water and getting my filters cleaned. Is there a treatment you would suggest being put on the filters when they are being cleaned?