Cannot raise CYA

[PoolDoc]

1. Watch the Taylor video, to verify that you did the CYA test correctly => http://pool9.net/tk/ (video links at top of page)

2. In the early AM, add 1/2 gallon of plain 8% bleach. Make sure the pump is on. After 1 hour, test FC levels with the K2006. Don't swim for 8 hours. Test FC levels again 8 hours after dosing. Report chlorine loss.


Using granular chlorine, it's pretty common for people to 'lose' the CYA when they clean their filter. This is especially true of pools where the pump doesn't run 24/7. Adding CYA using dichlor OR by putting the CYA in a sock until it's dissolved is much more reliable.

Of course, it's possible you added a mislabeled chemical.

[QiingGuy]

Hi Doc,

Thanks for the video link. Appears I'm doing it correctly. Also had two different Leslie's pools test with similar results.

I'm under the weather and will try what you suggest when I'm on my feet again. Until then I'm running my SWG 2 hours a day and adding a cup of bleach and that seems to be keeping the level where it needs to be or close enough. Want to get CYA to a point where I can only run SWG.

[QiingGuy]

2. In the early AM, add 1/2 gallon of plain 8% bleach. Make sure the pump is on. After 1 hour, test FC levels with the K2006. Don't swim for 8 hours. Test FC levels again 8 hours after dosing. Report chlorine loss.

Test Results
Prior to putting bleach in - 1
After putting bleach in and pump running 1 hour - 13
8 hours later - 3

[QiingGuy]

Today's test results from pool store:
FAC - 1.5
TAC - 4.5
Salt - 3,000
CYA - 70 - It's coming-up!!!!!!
TA - 120
pH - 8
Acid - 2
Pho - 0

[Big Splash]

With your stated 5,061 gallons, 47ozs CYA gets you to 70 (from zero). You added more than that correct?

FC is to low and pH is to high. pH could be much higher as 8 is the max result from the basic test.

[QiingGuy]

With your stated 5,061 gallons, 47ozs CYA gets you to 70 (from zero). You added more than that correct?

FC is to low and pH is to high. pH could be much higher as 8 is the max result from the basic test.

Yes, lowered pH to 7.5 overnight. Ran SWG overnight thinking it would bring chlorine up but it dropped overnight to about 1. I'm starting to think my SWG isn't functioning properly. Threw some bleach in this morning after I tested.

[mas985]

Today's test results from pool store:
FAC - 1.5
TAC - 4.5
Salt - 3,000
CYA - 70 - It's coming-up!!!!!!
TA - 120
pH - 8
Acid - 2
Pho - 0

That is a red flag. There is something in your pool causing high CC. This is what is using up your chlorine. It could be the same thing that is consuming your CYA as well. You need to shock the pool and keep it at shock levels until FC equals TC and FC holds overnight.

[QiingGuy]

There is something in your pool causing high CC. This is what is using up your chlorine. It could be the same thing that is consuming your CYA as well. You need to shock the pool and keep it at shock levels until FC equals TC and FC holds overnight.

Forgive my ignorance how do I shock it? Currious that the only notes from the pool store (wife took it in) was to lower pH using MA. EDIT: Just read the manual for my SWG and it says I can use it to shock the pool by pressing the boost button. It will run 8 times the normal time so in my case 16 hours. Also, I read and realized I've been running my SWG one hour short every day for my current temp I need to be running it 3 hours vs. 2. So, press the boost button and let it run 16 hours to shock or is there another way?

Also, this is what my SWG looks like. Could the white stuff have anything to do with chlorine not being made? When it's on it does bubble which the manual says is it making chlorine.

[Watermom]

Don't use your boost setting to shock the pool. That just wears out your cell faster. Just add bleach. Tell me your volume and I'll help you figure out doses of bleach. Also, please make a signature so that we don't constantly have to scroll through threads looking for info. Put your type and size of pool, volume, type of equipment you have, and that you have a K2006. You can make a signature by clicking on the link in my signature below.

EDIT -- Also put well or city water.

[QiingGuy]

Tell me your volume and I'll help you figure out doses of bleach.

5,061 gallons.