Big Midday FC loss?

[PoolMoDee]

Today was a sunny day... went from FC of 8 this AM to about a 4 after work.
Overnight FC loss is just about nothing.
Is this common? I seem to lose ALOT of FC during the day. My CYA last year was around 80-90, but Im down to about 40-50 this year... so I expected a bit better performance.
Pool looks clear as can be and healthy as far as I can tell. All tests are within spec.
PH- 7.5
TA- 80
CYA- ~45
Thoughts?

 

[duraleigh]

You're fine for now. If your overnight loss is as low as you say, you have no problems.

 

[jblizzle]

You are actually thinking about it backward ... at a higher CYA level, you would lose a lower % of the FC to the sun each day. So now that your CYA is half of what it was last year, it makes sense that you are losing more FC each day to the sun.

 

[PoolMoDee]

Hmmm.. so bump my CYA up somehow?

 

[jblizzle]

That is one option. Or just keep doing what you are doing.

It is surprising that you are seeing that high of a drop up in NJ with your CYA in the 40-50 range.