I am very frustrated at this point and I'm hoping you guys can help. I didn't close my pool and I'm now I'm paying for it. I have a 23,000 gallon inground with a Hayward s200 filter. It's been over a month. I started with a bottle of algeacide 60 and honestly didn't brush it well. At the same time I had 2 chlorine tablets in the skimmer and used two bags of powdered shock from the pool store. By morning, it was no longer green, just a milky blue. No visibility. I started scooping, vacuuming, and scrubbing. We pulled out rocks, a chunk of cement, leaves, broken glass yoohoo bottles, leaves, garbage, and straw from the dog house. We have spent countless days getting stuff out. It remained a cloudy blue but I was slowly gaining visibility. I added a bottle of floc at one point and it didn't do much. I was taking a sample to the store every 4-5 days, the just kept saying I needed more stabilizer. I discovered this site and started pouring in 3 gallons of bleach every 4-5 days. I went to a new pool store. They said everything was good but the FC was low and I needed a bottle of stabilizer again- my 4th. After each stabilizer they advised waiting 48 hours to do any vacuuming or back washing. I did that. I explained to the new store my process and she suggested it was time for more algeacide. At that point I didn't know there were diffent types so I don't know what kind that one was. I poured it into the skimmer- thinking it would distribute better and kill any algea in the sand. Since chlorine was low that day I added 5 gallons of bleach. We had a hard rain the next couple of days and suddenly I had green water again. Thinking it had something to do with the new algeacide I went back to my usual store and got algeacide 60. It did nothing. I waited 3 days and nothing. I concede and go get more algeacide 60, liquid shock, and chlorine tablets. 2 days later, yesterday, still green. The store says it must be in the sand. Put filter on recirculate, brush like crazy, change sand, but wait to switch to filter until the green is gone. Today it is still just as green. Filter is sitting with brand new sand in it. Switch to filter now? Pour tons of bleach in periodically through the day and try to clear the algea before filtering, or give up? I know that typically test kit readings are needed and I don't have one so I'm hoping for some suggestions until tomorrow when the store opens and I can get readings. Thanks in advance!