thanks for all the great advice. We've finally had some rain today. I turned off the filter this a.m. to hopefully let anything that was still being circulated fall to the bottom. I had to pump off some water this morning to keep it from overflowing but my FC was still at 15 this morning. I'm guessing that with the 2 backwashes and letting some off this morning I'm going to need to add some CYA. i'm keeping my fingers crossed to seeing some improvement when I get home.