Is fc too low?

[ethany]

I been running my pump for 12 hours per day and here are my numbers:
fc-2.5
cc-0
ph-7.9
ta-80
ch-230
cya-85

Is my fc level too low with a cya of 85? I have a swg and the pool is in direct sun all day.

 

[duraleigh]

How does your water look?

If it's crystal clear with absolutely no sign of algae or cloudiness, you FC is most likely okay.

Generally, speaking, that's a little lower than most pools should be, tho. (Check the FC/CYA relationship Chart up in Pool School)

Your pump run time is certainly adequate so perhaps you could boost the percentage on your SWG if you decide to bring FC up a little.

 

[ethany]

The odd thing is my swg is at max output. The pool water is clear but would be happy if fc was higher. Would I have too shock and extend pump time to maintain a higher level?

 

[ethany]

Oh, one more thing my salt level is 4000 ppm which is what manufact. recommends.

 

[duraleigh]

Hmm, that may tell us you have some invisible organics(algae) starting in there?

Do you know and understand the Overnight FC Loss Test? It's in Pool School if you're not familiar.

 

[reebok]

seems low to me. are you using that duoclear system? introduces cya I believe which you don't want more of. I wouuld do the overnight fc loss test if you have a fas-dpd test.
pool-school/overnight_fc_test

 

[ethany]

I will try the overnight test tonight.