This in-ground, vinyl liner, pool came with the house. It is 20,000 gallons. (Yes, I'll have to do the pool math.) Today the readout says the salinity is 3.0 My question is, what does the Salt generator need to be set on? The pool store says 20 but at 20 the salinity drops below the recommended 3.0-3.7 to 2.7-2.9. Right now I have it set on 50 (as of yesterday.) My FC had dropped to 1 although the pool water is crystal clear. I can see every dot on the liner in the deep end. I'm assuming by reading here, I have high CYA. I poured in 32 oz of 6% bleach last night. Panicked guessing! (I have no clue, just thought I needed to do something, even if wrong!) I have gone to 3 grocery stores and 6% is the highest original bleach I can find. I ordered the TF-100 last night. I have been using the strips. Unfortunately the pool store had me slowly pour 8.5 lbs of granular stabilizer into the skimmer 3 weeks ago. I run my pump 24/7. We closed in Oct 2 years ago. The pool was open, running and beautiful. We had it opened last May and had to put in a new pump. Because of travel we have only had it open about 4 weeks.