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Thread: Increasing CH without increasing chlorine?

  1. Back To Top    #1

    Join Date
    Jan 2014
    Perth, Australia

    Increasing CH without increasing chlorine?

    Dear forum members,

    I have tested by pool water and my CH needs to be raised. It is currently measuring ~130ppm and I would like it around ~275ppm.

    Checking pool math it seems I need to add something like 5kg of Calcium Chloride. The problem is (if I understand this right) that this will also raise my chlorine levels, quite a lot!

    What's the best way to do it then, turnoff my SWG and add the calcium over a few day in many batches? Or is there some other way?

    IG Fiberglass Pool - Sep/2013
    Pool capacity: 27,700 liter / 7,317 gallons
    Emaux V Series Sand Filters - Model: V700B; Size: 28"; Flow Rate: 89 gal/min
    Viron eVo P320 Pump; Flow rate (low/med/high): 32 gal/min, 56 gal/min, 66 gal/min
    Viron V18 pH Salt Chlorinator + RolaChem RP9 Automatic pH Controller

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

    Re: Increasing CH without increasing chlorine?

    Calcium chloride will not raise chlorine levels at all. Calcium hypochlorite does raise chlorine levels along with calcium levels, but that is a different chemical. As long as you use calcium chloride you will be fine.
    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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