Thanks Ben. I filled in all my pool info but it is not showing up for some reason?

It is a concrete 27K gal in-ground pool.

It is already turning green since I've ignored it for the past week, (since pool season is over). Do you think I should drain it now rather than wait? I was told to wait because the CYA may go down over the winter and therefore I would not have to drain as much? If I did drain it now, how much should I take out...all of it or no?

Thanks!