Morning all! Got a question for the forum experts. I am pretty convinced that I have been struggling with mustard algae for a while. It just looks like a stain on the walls. I've been maintaining a FC level of 10 - 12 with a CYA of 60. As long as the FC level stays up there, the stains are barely noticeable. However, when I get rain, I get a lot of organics washed down out of the oak tree above the pool, FC drops and the stains get darker.
My plan back in the summer was to wait until the water was too cold for swimming and take it up to MA shock level to try and get rid of it once and for all.
Now for the question. Will the combination of cold water (currently 62 degs) and FC level of 10-12 kill the algae over time? Or will it just go dormant and come back with a vengeance once the water warms back up?
As always, Thanks so much for this site and the helpful advice I've received!