I'm so glad I found this place!!! My pool is three years old.
I believe it is 27,000 gallons - vinyl.
Aquarite generator. Pump runs 12 hrs a day!
It has worked great up until this year. I killed the pump over the winter (electric bills). And I haven't gotten it right yet. The salt level is now around 2700 - that's after adding 150 pounds of salt. It kinda fluctuates for whatever reason (I like to keep it at 2800). I've set the generator to 75% and I can't get more than about 1.5ppm of FC in it. My cya is at 42. Is that enough? My pH is at 7.6. Calcium hardness is a little low, but we got rain last night so I will wait for that to level out. The pool is very clean, BUT it is not yet crystal clear like it always has been. I assume it is the lack of FC, but I don't know what to do. I have tried the "super chlorinate" shock feature twice now with limited results. The FC will go up for a day or so but then go back down. I also have a small amount of green algae trying to form on the walls. I swear if I ever get this back to perfect, I will never turn the pump off again for extended periods.
BTW: Could it be time to change my sand?

Help - I'm just very ignorant of this stuff. (If only it had a carburetor!)
Thanks for the time,
Brad