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Thread: New Plaster with Low Calcium

  1. Back To Top    #1

    Join Date
    Jun 2012
    Franklin, TN

    New Plaster with Low Calcium

    We had our pool built last winter and water has been in for about 6 months now. Even though my water has remained clear, I have been struggling to get water levels balanced over the past couple of weeks. It has become very warm here in Middle Tennessee and plenty of teenagers have been swimming as of late.

    Here is what I've done so far:

    FC 0
    pH 8.1
    Salt 2700

    Added Shock (SWG couldn't produce enough so decided to add this), Muriatic Acid, and obviously Salt.

    FC 3
    pH 7.8
    Salt 3100

    I did all of this over the course of a few days. I understand that the pH may remain a bit high until the plaster is fully cured so I'm not too worried about the 7.8 at this point.

    What concerns me is:
    CYA is 0
    Phosphates is 300 ppb
    Calcium is at 140 ppm.

    I'm worried about adding too much chemical for all the corrections to the new plaster. I have some Calcium in the garage but am very hesitant to add this now.

    Any suggestions? Thanks!
    23,000 gal Gunite w/Spa
    3 ft to 9 ft
    Hayward Pro Series
    Aqua Logic Salt System
    Polaris 280

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

    Re: New Plaster with Low Calcium

    Get your CYA level up to at least 30 right away.

    Ignore phosphates. They don't make any difference if you maintain appropriate FC levels.

    It has been six months since the pool was plastered, so it is well past time to bring the CH level up. Raise CH to somewhere around 300.
    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

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