I just recently bumped up my CYA from 50 to 60. It is working so well that in dumping in my usual every day or two addition, estimating, I'm now overshooting a little more than needed. I like to add enough to take it about 1 level above the top of my range. I've now overshot it a couple of times by 3-4 which isn't too drastic and still below shock. I guess I should test every other day until I know the "almost" exact amount to add. (I do test when the bather load is increased or it rains, which it hasn't in a while, but that doesn't happen often.)
This also gives me a little buffer for when I backwash instead of opening the filter for a hose off. It takes a lot of water to get our "cementous" dust and Fiber Clear flushed out.
gg=alice