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Thread: CYA Question

  1. Back To Top    #1

    Join Date
    Sep 2015
    Location
    Phoenix, AZ
    Posts
    2

    CYA Question

    My CYA has been dropping. Trying to figure out why. Someone had suggested the possibility of a leak, but wouldn't my salt level be dropping as well then since the water would be getting diluted? Not sure where to start my search for a cause.

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: CYA Question

    Is your water level dropping?

  3. Back To Top    #3
    needsajet's Avatar
    Join Date
    Jan 2016
    Location
    Sydney, NSW, Australia
    Posts
    3,556

    Re: CYA Question

    Welcome to TFP! Good to have you here

    There's a few possibilities. If you add your pool info as a signature, that will help you get the best advice here. Click "Read before posting" in my signature which has the instructions and some other good tips.

    CYA will drop from water removal and replacement (backwashing, splashout, followed by refilling). It will only go up if you add more.

    Salt can be added indirectly from other pool chemicals, especially chlorinating liquid, or by using softened water for refilling.

    If you tell us about your pool and how you operate it, we can figure it out.

    So an example would be an overflow letting water out, an autofill refilling with softened water. Another would be backwashing, then refilling, and chlorinating liquid added for a shock or as the day-to-day chlorine.

    Gradual loss of CYA is normal, and salt rising can be normal, unless diluted by rainfall or water with little salt.
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

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    Join Date
    Sep 2015
    Location
    Phoenix, AZ
    Posts
    2

    Re: CYA Question

    Here is my pool specs: 13K gal, IG pebble, Pentair VS pump, Sta-Rote System 3 cartridge filter, IntelliChlor SWG

    Pool built in Dec. No chemicals other then acid have been added to the pool since the startup. Have an auto water leveler and have not noticed any changes in my water usage on my bill. Salt has been stable since Dec and PH fluctuations have been what to expect with a new pool.
    13K gal, IG pebble, Pentair VS pump, Sta-Rote System 3 cartridge filter, IntelliChlor SWG

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    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: CYA Question

    Hi and welcome to TFP

    Can you tell us how you are testing your CYA and what kind of drop you're experiencing?
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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