I'm not using it chlorine tabs in my pool, just clorox. I add it at night. When I get home from work the following afternoon my FC is lower ( because of the sun and because it's doing it's job, right?). I add more chlorine and the process starts all over. Is it ok that my FC drops throughout the day? Should I think about a swg to maintain it? How do you all handle this?
One more question from a newbie
- Thread starter karmazrevenge
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The first thing to do is post the actual numbers you're seeing. The object is to raise it high enough at night that it's still above the lower recommended level for your CYA when you test it the next night.
It's perfectly normal for the FC to drop during the day. Most of us shoot for about a 2ppm loss per day.
It's perfectly normal for the FC to drop during the day. Most of us shoot for about a 2ppm loss per day.
Great! That's pretty much what I'm finding; I lose about 1.5 to 2ppm per day. Thanks for the reassurance! Should I be concerned if I ever find I lose more than that during a day?
Oh, and here's those numbers from last night and this afternoon 
Last night FC 5, CC 0, PH 7.6, TA 90
This aftenoon FC 3.5 (7 droppers to clear the tube), CC 0, PH 7.6, TA 90
Last night FC 5, CC 0, PH 7.6, TA 90
This aftenoon FC 3.5 (7 droppers to clear the tube), CC 0, PH 7.6, TA 90
What's your CYA?
If you start losing a good bit more than 2 ppm, I'd start finding out why.
If you start losing a good bit more than 2 ppm, I'd start finding out why.
Oh, sorry. My CYA is holding at 40. If my FC were to drop that much, would that be the time to an overnight chlorine loss test? Sorry....I'm just trying to learn as much as I can
Yes, the OCLT would tell you if the loss is due to something living in the pool. You could get more loss during the day as the sun becomes more intense in the summer, but the OCLT would tell you if it was due to the sun or organics.
Very good. Thank you for the information. Everyone here has been so nice and helpful so far and I'm really glad I joined!