Thanks! I bought 4 quarts of polyquat on Amazon. I hope the link you gave me went through the forum!
I vacuumed the pool to get rid of the auto-cover installation crud and backwashed before putting in DE. The backwash water was dark burnt-orange. Yuck.
Should I add more DE tomorrow night? How do I know when to stop adding it daily?
I will report chlorine results Friday morning.
BTW, thanks for cleaning up my signature. Much better!