Tested pool one week ago and my CYA was at 60. I did have to let some water out due to heavy rain. But my question is what would cause me to lose all my CYA so fast?
CYA completely gone
- Thread starter mterrell77
- Start date
- Nov 7, 2018
- 1,049
- Pool Size
- 14000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
How much rain have you had? In the month of May, we started with a CYA in the 80-90 range. During that month, we got 15" of rain (one deluge caused the pool to overfill) and we are now at 50; a loss of at least 40 PPM. So that *might* be a reason for the loss.
- Jun 22, 2014
- 47,855
- Pool Size
- 17888
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
You would have to change-out a lot of water to lose 60 ppm of CYA. I don't see it in your signature, can you confirm which test kit you are using? Did you do the testing outside on a sunny day? How old is the test agent you are using? Have you added any unusual chemicals lately?
Oly
Gold Supporter
Does not seem right. Don't jump the gun and add any more CYA until you are certain of your level.
I did buy it last year. But last week it showed 60 for CYA. It was not sunny it was late evening when I did it last night.
Oly
Gold Supporter
That may be the issue. The CYA test is a turbidity test and requires indirect light for a proper reading.
Did the rain cause dirt to get washed into the pool?
What are the readings for fc and cc?
Is the chlorine being added getting rapidly used up?
Is the pH dropping as you add liquid chlorine?
What are the readings for fc and cc?
Is the chlorine being added getting rapidly used up?
Is the pH dropping as you add liquid chlorine?
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