Can CYA go from 50 to 0 over 12 day period? Only water loss was a backwash and some waste after several days of rain.
CYA ??
- Thread starter Jdwrph
- Start date
- Jun 24, 2021
- 7,746
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
pH has held at 7.8 and CC<1.0 through the time period. Can you have ammonia without low pH and high CC?
- Jun 24, 2021
- 7,746
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
Not likely...but...what has your FC done?
Also, with all the rain, how much have you run the pump to circulate the water. It may be that it has stratified (rainwater on top) and you sampled that...
FC had held 6-9 range prior to rain, after rain ~1.0. Pump has been running 24 hrs/day but my return jets are aimed up. I’m going to direct them more downward and retest tomorrow. Thanks
- Jun 24, 2021
- 7,746
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
It may be worth a retest on the CYA. The only time I've seen CYA "disappear" rapidly is with Ammonia.
If CYA is actually 0, I would run the Ammonia test by adding liquid chlorine and testing shortly after...read procedure in ammonia article.
If you're holding some FC then you don't have the Ammonia problem.
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