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Thread: ABG Season Startup in the UK

  1. Back To Top    #1

    Join Date
    Aug 2010

    ABG Season Startup in the UK

    Just starting up the pool with fresh tap water.
    the area in the South West of England has fairly hard water with relatively high CaCo3 levels.
    I have the following chemicals at my disposal
    Sodium Hydrochlorite 14/15%
    Dry Acid
    Stabilized Chlorine Granules 55% (with built in stabilizer)
    Calcium Hypoclorite Shock 65% min

    Ph is 7.3
    CaCO3 is 267 (Calcium hardness)
    Chlorine is zero
    I think we can assume CYA level is almost zero from tap water.
    Water Temp is 14C (fyi it was 12C out of the tap!!)

    Reading Pool School I need a week or so of stabilized chlorine to add CYA levels.
    As the CYA level increases to 30-50 I should revert to Sodium Hydrochlorite.

    and thanks for your help in my 2nd season.
    Intex Ultra Rectangular AGP 18*9*4
    Certikin hydroswim HPS .5hp pump
    Azur 15" Sand Filter (pentair)
    EGFM glass particles (10kg of 1-3mm and 25kg of .5 - 1mm)
    Calorex AW910 Heat Pump

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

    Re: ABG Season Startup in the UK

    Yes, switching to Sodium Hydrochlorite is a good idea once CYA gets to around 50.
    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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