My pool is clear but not holding chlorine level. I put 5 96oz jugs in today and two hours later it read that there was none. My cya is 50 I will post other numbers tomorrow. I just thought it really weird and I have no clue what to do. It has done this for two weeks. Not registering that I pour bleach in it. What could be causing this?
what would cause this........
- Thread starter passionsrlz
- Start date
passionsrlz said:
Possible poor quality bleach...3% or simply too old.
False test results
High amount of organic matter in water.
...what else??
Many things could cause that situation, including low CYA. Likely you will need to shock, but we'll need a full set of test results 1st. Also you may perform the overnight FC loss test, if your water is clear 
I will buy some higher end bleach, I always buy the cheap stuff and have never hand an issue. But this is crazy wierd. Last I checked CYA was 50. What could cause that to go down?? I am sooooo confused.
CYA usually only goes down when you replace water and sometimes when the pool is closed for the winter.
No replacing water and water level holding steady. Just not keeping bleach. I had an algae bloom earlier this year and when I poured five bottles of bleach in the water two hours later it still had some. I am showing none at all......very frustrating.
could I have a bad regent? I left it in the heat and it is really really got here right now.
Back to the bleach, please put 1/4 teaspoon bleach in 2 gallons of tap water. Test FC of tap water alone and bleach and tap combined. Will need FAS-DPD test for this, using drips, not strips or other color based test.
Please post a full set of test results so we can see everything in one place. That'll give us a better idea what's going on.
passionsrlz said:
You could have bad reagent. I did one year and didn't realize it until I used a different, newer test kit one day. My FC results had been consistent, but lower than I thought they should be, like around 2 ppm. Newer test kit showed FC to be closer to 5 ppm and that was closer to where I thought it should be, based upon the amount of Cl I was using.
Just my experience. YMMV.
Good luck.