Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Low CYA but using 3" tabs?

  1. Back To Top    #1

    Low CYA but using 3" tabs?

    All,
    I just found this forum after my guess and book-reading on pool maintenance wasn't getting it done recently. I decided I had to shock my pool (as it was turning a bit green) and I wanted to do it right. I followed the directions in the shocking the pool section using Trichlor and brushed like a maniac to get it looking gray rather than green. FC is up in the 20 range for 24 hours now.

    However, the CYA on my multi-test strip is always reading below 30ppm, and I only have two ranges 0 - 30 - 60 - 80. I got the strips this year at Leslie's pool (as I didn't know what else to get at the time, and strips are easy for me). I am a little worried about the CYA reading, because I have been using tabs for 5 weeks now, at a rate of about 2 or 2.5 a week. So by estimates here, I should be near the 90 ppm mark for CYA, and yet my test strip is showing 0?

    I want to get a proper water test kit after reading this forum, and use the BBB method, and the pool calculator, but **** I just keep sinking more money into this pool. Do I need to worry about my CYA levels?

    Thanks
    Ian

    The exact shock I used is here:
    http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051
    20x40, gunite/CL Sunstone Pearl finish, Jandy DE filter, 400K BTU Raypak NG heater, 1.5 hp Jandy Plus pump, Polaris 380 cleaner, Cover-Pools auto cover, Nature2 Fusion sanitizer, BioGuard 1200 Test Kit

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Low CYA but using 3" tabs?

    Welcome to TFP!

    You need to be concerned about CYA, but I wouldn't go all the way to worried

    Test strips are not a reliable way to measure CYA levels. I recommend you get a real test kit, or at a minimum have your water tested by a pool store.

    It usually takes more than 5 weeks of normal use of trichlor tablets before CYA levels get too high. The "shock" product you are using is much more problematic, since it will raise CYA levels very quickly.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Re: Low CYA but using 3" tabs?

    So I should not be worried, but just be concerned. Ok got it.
    Then in the very next line, you say the shock product I used will raise CYA rapidly. Which is which, be worried, or not? (hahaha, no really though?)

    Anyway, I guess I will HAVE to get a better test kit now. There goes another 70 bucks. Hopefully it is money well spent. Good news is, I did just get a text from my wife who says she loves the blue pool this morning, so it isn't ALL bad!
    Ian
    20x40, gunite/CL Sunstone Pearl finish, Jandy DE filter, 400K BTU Raypak NG heater, 1.5 hp Jandy Plus pump, Polaris 380 cleaner, Cover-Pools auto cover, Nature2 Fusion sanitizer, BioGuard 1200 Test Kit

  4. Back To Top    #4
    harleysilo's Avatar
    Join Date
    Mar 2012
    Location
    North Georgia
    Posts
    1,924

    Re: Low CYA but using 3" tabs?

    Quote Originally Posted by IanB22
    So I should not be worried, but just be concerned. Ok got it.
    Then in the very next line, you say the shock product I used will raise CYA rapidly. Which is which, be worried, or not? (hahaha, no really though?)

    Anyway, I guess I will HAVE to get a better test kit now. There goes another 70 bucks. Hopefully it is money well spent. Good news is, I did just get a text from my wife who says she loves the blue pool this morning, so it isn't ALL bad!
    Ian
    Don't worry, it will be the best money you've ever spent on your pool!
    18'x43' Sport Pool
    19,000 Gallons Vinyl Liner 3'-3.5'-4'
    SWCG and D.E. Filter
    Test Kits - Pool Calculator - Chlorine/CYA Chart - Pool School

    Secret Weapon for Pool Chemistry Testing

Posting Permissions

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