Hi I've been adding CYA (up to 5lbs now) and still can't seem to get it to register even at the 20 level. I'm using solid CYA in a sock in the skimmer. I put this in over a week ago...still nothing. Any other ideas?
CYA has been consistently low
- Thread starter lahost52
- Start date
How big is your pool? Can you update your signature and location please. It would help us out a lot! Thanks! 
Please add your pool details and location as described HERE to your signature as it will help us help you.
We would need to know the pool size to even start to offer ideas.
Where did you buy the CYA? What is the strength listed on the bottle?
We would need to know the pool size to even start to offer ideas.
Where did you buy the CYA? What is the strength listed on the bottle?
Have you guys been getting a lot of rain? That could be why you aren't seeing an increase.
Thank you I updated my signature with the requested info. I have the TF 100 test kit. Following are current readings
FC: 7 ppm
CC: 5
Ph: 7.8
CH: 420
CYA: below 20
Alk: 120
FC: 7 ppm
CC: 5
Ph: 7.8
CH: 420
CYA: below 20
Alk: 120
I think that that is your problem especially if you have been draining the excess off the pool.
In a 25k pool, 5 pounds would have only added 24ppm of CYA ... plus given the rain ... I am not too surprised you are reading less than 20ppm.
Add another 2-3 pounds to get you up around 30ppm at least.
Add another 2-3 pounds to get you up around 30ppm at least.
Be prepared to lose some of that because the rain isn't suppose to let up for another week! 
It's HORRIBLE!!!
(That's my rant of the day!) 
It's HORRIBLE!!!
(That's my rant of the day!) 
techguy said:
Wouldn't hurt.
Also, just to be sure. One's CYA can also start disappearing if you have a leak. Folks who use autofills and are noticing a trending downward in their CYA can also suspect a leak. The only way to lose CYA aside from a loss over the winter in a closed pool is for it to be splashed out or emptied from the pool either through a leak or down the drain.
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