The readings have been pretty consistent; overnight FC drops 1-2 ppm, and CC is unchanged at about .5 ppm. FC drops to 0 by noon next day. I think the pool is clearer than it's ever been. I plan to make final checks tonight, and change the sand tomorrow. I watched the pool guys do it a few years ago, and it doesn't seem to difficult (just cold and messy). Are there any gotchas? Is there a procedure I should follow? Thanks so much for all the help with this process!!!

Oh, one more question...I've seem a number recommendations on the appropriate CYA value. I was planning to shoot for 30 ppm. Is this reasonable?