What's the deal with chlorine tabs?

cpmoshjr

Member
Jun 7, 2016
22
Houston, Texas
Hello all - I have a general question about using chlorine tabs in my in-line chlorinator. Regardless of what my CYA level currently is, is it true that chlorine tablets in general contain Trichlor and that continued use will gradually increase CYA levels?

Thanks!
 

n240sxguy

Well-known member
May 17, 2014
1,802
Benton, KY
Yes, that is correct. I'd say rapidly vs gradually though. 4-6 hot summer weeks could have you way over the recommended cya level.


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Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
20,435
San Dimas, CA (LA County)
Yes, that is correct. I'd say rapidly vs gradually though. 4-6 hot summer weeks could have you way over the recommended cya level.
:goodpost:

To expand on that, according to poolmath, in a pool your size, one puck will raise FC by 5.3 and CYA by 3,2. If you figure most pools lose 2-3 ppm FC per day, then you can reason that you'll use half a puck per day, which will add 1.6 CYA per day. In round figures, 11 per week. If you start with fresh water now, by 4th of July you'll be at 100 CYA.
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
31,537
Sebring, Florida
am I to understand that it is probably safest not to use them
The better answer is TFP teaches not to use them if possible and understand how to use and manage them if you need to.