Can't Lower Cl Level

[matthewnadeau]

Thank you for your responses. I am using pucks and I alternate liquid every few applications.

I took a sample to the pool supply store to get it tested (to confirm that my test kit was accurate). They confirmed that the readings were correct - Cl is about 10ppm and CYA is about 115ppm (down from 150-ish).

I am going to stop adjusting the chemistry and leave it as-is (as was recommended above). They CYA will eventually come back down to normal levels.

I think that I need to go away from using the pucks as often as we have been using...

[FormerBromineUser]

I think that I need to go away from using the pucks as often as we have been using...

Sorta right. You need to stop using the pucks altogether. You can save what you have for extended absences, but that's it. Every puck adds CYA and your CYA is already silly-high.

[swimdaddy]

Agreed. Live by the motto "only put in your pool what it needs to be clear and comfortable". Your pool needs chlorine and a balanced pH, everything else is just to help maintain chlorine and pH. The exception is needing calcium in plaster pools.

[Anonymous [GDPR] European in the UK]

They CYA will eventually come back down to normal levels.

I think that I need to go away from using the pucks as often as we have been using...

The CYA will not normally come down on its own but if you use unstabilised chlorine at a high level you will oxides the CYA down to a reasonable level. I had to do this last year when emptying was not possible and I used around 80-100 litres of liquid chlorine