Bought a tf 100 last September. I was typically testing the cya level at about 30. Haven't tested in a few mounts... Now I'm getting zero. Trying to figure out how this is possible... Did not empty my pool, but I do probably replace about an inch of water every week or two (pretty sure I have a leak).
Cya test /R0013 shelf life
- Thread starter FLRob2954
- Start date
- May 3, 2014
- 58,634
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
@FLRob2954 Did the additional stabilizer correct your problem? Asking because I’m having a similar issue this year. My pool tested zero (the black dot never changed at all). Within the past week Ive added enough stabilizer to bring it to 60 with no increase at all. My R-0013 was purchased 6/25/20 & has been kept in a climate controlled setting. I’m trying to determine if the stabilizer is bad or the reagent.
The R_0013 (melamine) is chemically inert and really doesn't go bad. The CYA does deteriorate slowly and should be tested roughly once a month. Excessive rainfall (where the pool overflows) can sometimes account for some degradation of CYA