One more question from a newbie

karmazrevenge

Well-known member
May 22, 2012
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0
#1
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?
 

Bama Rambler

Mod Squad
LifeTime Supporter
TFP Expert
Jun 23, 2009
22,789
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105
SouthWest Alabama
#2
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.
 

karmazrevenge

Well-known member
May 22, 2012
95
0
#3
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?
 

karmazrevenge

Well-known member
May 22, 2012
95
0
#4
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
 

karmazrevenge

Well-known member
May 22, 2012
95
0
#6
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 :)
 

jblizzle

Mod Squad
LifeTime Supporter
TFP Expert
May 19, 2010
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Tucson, AZ
#7
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.