Is this normal?

[RonsPlc]

I have been slamming my pool for the past week, and am seeing a VAST improvement in the water clarity...
My question has to do with the CYA level... I don't see ANY CYA in my pool, however after a full day of sun, my FC only dropped 5ppm from 16 at 6am to 10.5 at 6pm.
Without any measerable CYA, is this a normal drop? I expected the FC to be a LOT lower this evening.

levels at 6pm

FC 10.5
CC 0
TA 80
PH 7.2
CYA <20

I have had 0 drop in FC in the overnight drop test for the past 3 nights straight.

 

[Patrick_B]

There really isn't a normal. You are doing well with that little loss, so you must be getting close. You can up it a little if you like and see if a little more Cya helps. Looks like you are just waiting to clear now.

Welcome to TFP, and congratulations for taking the ball and running. Good job!

 

[woodyp]

Mine loses 4 ppm daily and lots here don't consider that to be "normal".