I began using a Chlorinator dispenser last summer. (3 inch tabs) Pool is 57,000 gallons. I monitored CYA levels routinely thru the season and metered the dispenser back when I saw the CYA getting in the 40 ppm range. At the end of the season I closed the pool with all levels balanced. I opened the pool a month back and upon doing my initial tests I found the CYA level at 100 ppm or greater. I've been draining water in an attempt to lower the level. So far I've pumped out over 7,000 gallons and put in fresh water. I've only been able to get the level down to 60 ppm. How much more dilution is necessary for a proper level. But.... the big question is... "how did the CYA level increase through the winter?" I want to avoid this situation next year.
High CYA over Winter.
- Thread starter Young Doc
- Start date
cwswifty
Well-known member
- Sep 14, 2023
- 98
- Pool Size
- 26500
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Jandy Aquapure 1400
There's nothing wrong with a CYA of 60 ppm. It will drift lower over time if you'd like it to be lower.
- Feb 6, 2015
- 6,276
- Pool Size
- 12300
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
If you are testing at a pool store all kinda of weird reaults can happen. If its with the TF-100 then there must be some tablets or closing chemical that got added. I guess test error or bad reagents is also a possibility.