UPDATE:

Looks like it will take 2 days to clear with more vacuuming. Getting up the sand is s-l-o-w. There's still a noticeable amount in there but some gets taken up with each vacuuming. I'm going to stick with the trick of a little DE after I backwash.

And your right WM, I meant CC was 0.

While I'm a new poster, I'm a seasoned lurker. I experienced the all too familiar Mid-July algae bloom because my CYA levels went up and up and up all the time being told by the local friendly pool folks the FC at 3 was just fine.

I know so much better now.