Does CYA "degrade" or does the test just kind of suck?

If you stop using the trichlor, it’s probably not needed to dump water. It’ll degrade over a few months and splash out along rain will help you out for free.
Yes, I do know but last year I had a bad outbreak of Algae. That is how I found this place. With the CYA climbing I fear one ship off my high of FC of 11 will be a SLAM fest at FC of about 24 again that I would really rather avoid.
 
Yes, I do know but last year I had a bad outbreak of Algae. That is how I found this place. With the CYA climbing I fear one ship off my high of FC of 11 will be a SLAM fest at FC of about 24 again that I would really rather avoid.
Curious why your CYA is climbing? Are you still using pucks?
 
Haven't rechecked my CYA since adding the 2lbs but I will tonight. Have about a pound left of this batch which was from HD.

I had 8 lbs from Amazon I bought this spring. Gave 4lbs to a friend when they did a fresh fill of their above ground July 4 weekend. That should have given them 50ppm according to poolmath. I tested their pool a week after and they were at 20 ppm.
Have you had any success raising CYA? I'm about to give up and let mine sit at 35-ish.
 
Have you had any success raising CYA? I'm about to give up and let mine sit at 35-ish.
Sorry! Completely forgot to post back. Added the last pound and still nothing. So 3 pounds and no change. I picked up some more of a different brand, added about 3-4 pounds over 2 days and retested. I’m up to 70 now and holding there.
 
Retested tonight when I finished up chores. Still 70. This batch is PacifiClear. Picked it up at Taylor’s Do It Center. 100% CYA.
 
CYA will degrade about 5-10 per month. Maybe on the high end if your pool water is higher than 90 Degrees.
Another reason to give my chiller a hug (if I could get my arms around it.) My CYA remains pretty stable throughout the summer, but I also keep water temp in the low 80s.
does the test just kind of suck?
100% it does! I hate the dot test.
 

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I find that my pool does best between 70-90 CYA. I bought 50lbs of RxClear earlier this year that seems to be working well. I lose more than 10ppm of CYA per month so I test and add often.
 
Lost my mom early this summer and didn't have the motivation or drive to test and deal with liquid chlorine so for about 6-7 weeks i only used pucks. Cya was 50 before I got lazy, and 50 once i resumed somewhat normal testing. Is the cya degrading in full sun with no cover or is my spunky 5 year old splashing enough out? Btw, never once had algae this summer.
 
How many pucks did you add? Per 8oz puck of Trichlor, you would have added 3.7ppm of FC and 2.2ppm of CYA to your 15k gal pool.
 
How many pucks did you add? Per 8oz puck of Trichlor, you would have added 3.7ppm of FC and 2.2ppm of CYA to your 15k gal pool.
I loaded the chlorinator up with 6 or 7 at a time. Would last 1.5- 2 weeks. I was doing some further reading that you round up on cya readings, so if it was in between numbers its actually 60 now as opposed to 50. I have a tf pro, but also tested with the pentair rainbow cya kit (very similar, tube but you add solution, etc) and it was similar.
 
Sounds like you would have added probably about 25 pucks over that time, increasing CYA by about 50-60ppm, I'd say.

Do you have an autofill that could hide a leak? How has your CH developed in that time?
 
Sounds like you would have added probably about 25 pucks over that time, increasing CYA by about 50-60ppm, I'd say.

Do you have an autofill that could hide a leak? How has your CH developed in that time?
No autofill but water doesn't stay above the collar of the skimmer. Assuming it leaks out there so any significant rain will cause some water loss. The water never stays above 3/4 way up skimmer if that makes sense. But once at that level it doesn't drop.

I didn't test often during that time but ch was between 3.5 - 7 when I did.
 
Sorry, guess I wasn't clear enough. With CH, I meant calcium hardness, not chlorine. Just to see if there was a correlation with the CYA development.
 
Calcium stays in the water for good. If someone has very hard fill water that's been used to replace evaporated water (which leaves the calcium back in the pool), CH increases over time. But if there is a leak and you replace calcium containing water with fill water (at a different CH level), then the pool CH will drift towards the fill water CH.
 

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