Chlorine 12 ppm, PH 7.5, No Reading For CYA?

[Quarterwave]

Hi everyone,

I tested the CYA level in my inground pool last night and the CYA level in the Taylor testing kit that I use did not even get close to the 100 level - the black dot disappeared just a few drops in and a LONG way off the first marker, which is "100" and then goes up to "30".

What does that mean? Too much CYA?

I had none a week ago and put in 4 lbs about 3 days ago.

Any help is appreciated.

 

[jblizzle]

That means your cya is way way way above 100 PPM and that you need to replace water to lower it.

How did you get the reading before that said you did not have any cya?

 

[Quarterwave]

Hi, thanks for replying. I have not put CYA in the pool for 2+ years.... until just recently.

 

[domct203]

Hi, thanks for replying. I have not put CYA in the pool for 2+ years.... until just recently.

How do you normally chlorinate the pool?

 

[jblizzle]

Dom is asking the right question. Have you ever used chlorine tablets? If so, you have added CYA. Have you every used dichlor shock powder? If so, you have added CYA.

Check these out:
ABCs of Water Chemistry
Recommended Pool Chemicals
How to Chlorinate Your Pool