Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: confused with my CYA results

  1. Back To Top    #1

    confused with my CYA results

    I can not understand why my CYA is reading high. I have a taylor kit. I lost a lot of water over the winter, so I opened my pool with 3/4 fresh water fill up. I used city water. I used 2 pounds of dichlor shock, like I do every year. I have not added any more chemicals. That was a week ago today. My test today was ph: 7.4 FC: 8 TA: 100 CYA: 90. I do not know why I have such a high cya when I filled more than half the pool with new water and I did not add any stabilizer. I used some strips just for giggles and it showed my cya is low. I do not know what to believe.
    15000gallonVinylAG, sand filter, built in 2007

  2. Back To Top    #2

    Re: confused with my CYA results

    are you letting your water get to room tempature if your water is cold. I know i was getting higher readings when i tested colder water and someone on here told me to let it get to room tempature before doing the test
    30k inground Kidney 42x22 TF-100 test kit

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: confused with my CYA results

    If you did the test in dim light, it will read a lot higher than it is. I always do mine in full sunlight on the bright reflecting patio, turned so I don;t get any sun directly on the sample so I don;t get any glare on the surface.

    Also try pouring it back in the mixing bottle and shale again, then repeat it several times until you're confident.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  4. Back To Top    #4

    Re: confused with my CYA results

    my water is 78 degrees and looks great. My wife, daughter, and I took a dip couple days ago. The water felt good. Is it normal that I still have a FC of 9 when I haven't added any bleach since my shock a week ago? I want to make sure my CYA is correct before I start adding bleach. Thanks Jeremy
    15000gallonVinylAG, sand filter, built in 2007

  5. Back To Top    #5

    Re: confused with my CYA results

    Have you tested again and gotten the same results? I have made mistakes while testing such as filling water to the wrong level or adding too much reagent.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts