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Thread: Low CH & High Pho

  1. Back To Top    #1

    Join Date
    Apr 2017
    Lancaster, CA

    Low CH & High Pho

    Hello to all,

    I have a few questions. I completely filled my pool about a week ago and today I took my first water sample to my local pool store. So far, I have added 3lbs of conditioner (24hrs ago) and 1 gallon of 10% chlorine (24hrs ago). The following are the test results:

    11,000 gallon pool.

    FAC 1
    TAC 1
    CH 100
    CYA 40
    TA 70
    pH 7.4
    Copper 0
    Iron 0
    TDS 200
    Pho 500

    My question is, is it normal for CH (100) to be low and Phosphate to be high (500) on this freshly filled pool? or pool store is just trying to sale me chemicals? My Taylor K-2006 test kit should arrived in a couple of days but was a bit curious about the results.

    Thank you in advance.

  2. Back To Top    #2
    Mod Squad Texas Splash's Avatar
    Join Date
    Jun 2014
    South-Central Texas, Marion/San Antonio

    Re: Low CH & High Pho

    Hello JC and welcome to TFP! For now, I would simply disregard those pool store tests. They are almost always wrong, and "yes" they do all they can to sell you their products. What I would suggest is the following:
    - Update your signature please. You can click EDIT YOUR SIGNATURE. It will help us later.
    - Use the Poolmath calculator to determine what your CYA should be based on how much conditioner you added and the size of your pool. Don't rely on what "they" told you.
    - Based on that CYA, go to the Pool School - Chlorine / CYA Chart and increase your FC to the proper level as based on that chart. Use regular bleach and nothing else to increase the FC.

    Don't do anything else right now until your K-2006 arrives. You did great ordering that early. Once you get that test kit, post YOUR numbers and we can help from there. That's the best way. Have a great day.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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