Quick background .. we bought this house in December. The previous owners had entirely neglected the pool, it sat stagnant most of last year and from what the neighbors are telling me even when it was cared for it was done very poorly. I finally worked up the nerve to open it a week ago, it was massively infested with algae and debris and some wildlife in various stages of life and death. We removed all of the leaves and what not; unfortunately the water got so stirred up that we could not see the bottom anymore. We also had to add about a foot and a half of water. Finally we hooked up and turned on the filtration system and started the process of shocking, filtering, and backwashing regularly. I initially shocked it with six Walmart Ultra Bleach containers (8.25 gallons 6%) and have been using three per night since then. The water is at the cloudy grey stage now but has not progressed much the last few days.
My first testing numbers with a Taylor 2006K kit:
FC = .8
CC = 5.0
pH = 7.5
TA = 230
CH = 230
CYA = < 30, probably basically nothing, the sample did not cloud up at all.
Water temp is around 65 at the moment.
I have a skimmer sock on that is consistently gumming up with brown crud I assume to be dead algae. I'm backwashing the filter fairly often although I must say I don't notice much dirt coming out when I do so, and the pressure is never rising above around 20 or so on the pump. I had one suggestion to let the pool sit over night with the filter off and let some of the stuff settle in hopes of being able to vacuum it up, which I have not tried yet. I am waiting on adding CYA until the water clears up since I was told not to backwash for a week after adding it. I'm not sure what else to do at this point other than continue to shock / filter / backwash the system. I saw one fellow claiming adding some polyquat 60 at this point cleared his pool up over night, although I'm a bit skeptical.
Oh, this is an above ground 24' pool with around a 13,000 gallon capacity or so. I'm using sand filtration.