CYA Drop

[LFRoberts5]

After getting used to the test methods I have some numbers that I would love for the "experts" to look at.

Ph 7.4
FC 14 Has been that way for a couple days.
CC 0
TA 200-250
CYA 60

The water is crystal clear.
Are these numbers OK?

I seem to have "sand" in the bottom of the pool and "grit" on the sides of the pool. Could this be caused by high TA levels?

THANKS!