CYA 230, replaced 1/2 of water...now 217???

[bc9nd3h]

The Chlor Brite shock you aded to the pool contains CYA adding more to your headache. I think everyone hear would tell you to stick to just bleach.

[rollinrock]

I'm new her too but last year I had the same problem and emptied pool to no avail. I went to a different pool store and guy said to put in 10 to 15 gals of bleach. I did that and no problems since.

[cgc2]

I would still drain again.

Knock that sucker (cya) down further.
140 is too high and your going to need to maintain a FC level that is high.
I have spent a summer swimming in 11+ppm FC as a result of high cya with no negatives effects.
I never really felt comfortable about it, but It was what was necessary.