Raising CYA

[611Manetta]

I have been having a hard time raising my CYA.

Recent test results:
PH - 7.8
Alkalinity - 160
CYA - 30 at best, black dot barely went away when all of the mixture was added
FC - 3
TC - 3

I added about 3 lbs of cyanuric acid via the sock method last weekend and then added about one pound directly to the skimmer yesterday.

Pool looks crystal clear.

 

[cowboycasey]

the CYA put into the skimmer will take a while to get into the pool.. You will probably backwash most of it out so do not count it really... only do the sock method..

It can take a week before it will show in a test..

 

[611Manetta]

the CYA put into the skimmer will take a while to get into the pool.. You will probably backwash most of it out so do not count it really... only do the sock method..

It can take a week before it will show in a test..

I did the sock method last week, little increase. Trying to get the CYA to 70 since it is a salt water pool. Should I try the liquid stabilizer or stay with the granular and sock method?? Also, will high PH and Alkalinity cause issues with raising CYA?? Currently I am high on both.

 

[setsailsoon]

I used the sock method and squeezed the sock a couple times per day. This helps a LOT. Within 3 days it was always completely gone and CYA went up just like Pool Math predicted. Also, CYA lowers the pH significantly so starting at 7.8 or so never was a problem for me. As @cowboycasey recommended above I would never put CYA directly in the skimmer.

Chris

 

[PoolGate]

Here is a primer on adding CYA. Also a picture of what you should see when testing.