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Thread: Calcium high

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    Phoenix
    Posts
    9

    Calcium high

    16000
    PH 7.2
    Chlorine 7.5
    Calcium 1100
    Alkalinity 120
    CYA 80

    Should I be concerned about calcium being so high? Our in coming water is 400.

    Any suggestions?
    15000 gal, IG, Plaster, Sand, 2004, Kreepy Krawly

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,926

    Re: Calcium high

    Many areas in the Southwest are notorious for having high CH levels. To help compensate, it is imperative that you continue to counterbalance that high CH with a low pH and TA. You've done that with the pH, but your TA could be lowered a bit as well. This will also help keep your "CSI" level in a relatively safe zone as noted on the Poolmath calculator which will help to prevent scale build-up. Your CSI is at about "0.3" right now which is good because your pH is on the low side. If your pH increased to just 7.5, your CSI would shoot-up to 0.58 which is at the 0.6 limit for potential scale. So you're doing well with the lower pH. With your current pH of 7.2, if you lowered your TA as well to about 60, your CSI would almost be neutral at -0.1. So keep an eye on your pH and TA and watch how they effect your CSI level on the Poolmath calculator to ensure the CSI doesn't creep-up over 0.6. Have a nice day.
    Pool School - Lower Total Alkalinity
    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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  3. Back To Top    #3
    Mod Squad pooldv's Avatar
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    Aug 2012
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    DFW, TX
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    23,994

    Re: Calcium high

    Yep, +1 to lowering TA to 50-60. More here, Pool School - Calcium Scaling
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  4. Back To Top    #4

    Join Date
    May 2016
    Location
    Phoenix, AZ
    Posts
    100

    Re: Calcium high

    Typical for Arizona.
    Keep you pH down to keep your CSI number low.
    You can check the CH level of your fill water and, if low, you can drain and refill your pool when it cools down or get RO done.
    13k Pebbletec Pool/Spa, Hayward Ecostar, SGS Breeze 540 SWG, Pentair C&C 420 cartridge, Pentair MasterTemp Heater, Caretaker system, TF-100 & Taylor K1766 test kits

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