Big CL Demand/CYA Process time?

[h20man]

Happy Mothers Day!

found out yesterday I have 7 CYA & my pool consequently hasn't been holding CL @ all! I slowly poured in 6 llbs to the skimmer in day & @ night poured in 2 gallons of 10% bleach , wake up this morning to find same exact low CL reading of 1ppm ??

I have an unusually large skimmer that if I reach into w/ my arm all the way extended , I still can't reach the bottom! I noticed alot of the CYA acid sitting @ the bottom of the skimmer so I worked it up into the filter (still some on bottom)

my question is how long does it take for the CYA to take shape & guard the CL? Don't want an algae bloom & I'm hovering on 1-2ppm 20k gallons/ 85 deg

here are my numbers & thanks!


FC 0.1
TC 0.2
CC 0.1
PH 7.3
CYA 7
TA 178 - high
CALC 385 - high

[Poolidiot]

Everything I have read and been told is that when you put CYA in your pool, you dont test or add more of it for around a week. CYA desolves very slowly and will take about a week

[duraleigh]

Boyd's info is correct...it'll take a while for the CYA to show up. You also did the right thing by getting out of the skimmer into the filter...that'll speed up the process. Don't backwash 'til your CYA test reads about 30 -40.

Meanwhile, you are also smart to keep putting in Cl of 10% every evening.....it is being consumed by bad stuff...probably algae you can't yet see. Test each evening for Cl before you put it in and then put in enough to bring your total up to 10-15ppm.

The "bad stuff" eats the Cl at night and, 'til your CYA takes effect, the Sun eats your Cl during the day. It may not seem like it but you're doing all the right things and you'll stabilize soon.

Thanks for those numbers. You can work on the Calcium and Alk in another post.....you do not have a harmful situation with either....just some fine tuning to do.

[PatL34]

This is the way I have been adding CYA and it works a lot faster than using the skimmer or filter.

http://www.poolforum.com/pf2/showthread.php?t=1139

Pat

[Poolidiot]

Pat that sounds like a pretty good method, I am about to have to add some cya and will give your method a try

[h20man]

thanks 4 the help !!
KE

[h20man]

ok cool, =but I'm burning through 2 gallons of 10% liquid bleach every night @ this pace!! Pool always tests @ around 0-1ppm the next day.....could just warm water eat up CL? we swam yesterday , but the majority of the days are covered w/ a Coverstar top. I forget what is average during hot days for CL consumption, but I don't remember it going this fast! thanks, hope the CYA police show up soon!