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Thread: Raising CH

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    ozdiver's Avatar
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    Raising CH

    My CH is a little low (225) for a plaster pool so I am looking to raise it to 260.
    Is it ok to swim immediately after adding calcium chloride? Or should I wait until tonight after last swimmer is out?
    40k gal freeform, IG pebblesheen, 9'x'6' raised spa, 2-1/2 hp Whisperflo, 520 sq/ft cartridge, Legend w/ booster, Intellibrite 5g in pool @ spa, Rainbow 320 Chlorinator(retired),
    Mastertemp 400k BTU, 3x3 hp Whisperflo Swimjets, 2x2 hp Whisperflow for 15ton moss rock waterfall, Intelitouch Controller, 850 sq/ft Travertine deck, Gas/Wood firepit,
    Autofill, TF-100 test kit w/ SpeedStir

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    Mod Squad jblizzle's Avatar
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    Re: Raising CH

    In TX, I would not add any CH ... it is going to rise fast enough just due to evaporation.
    Mine rises about 150ppm yearly.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    ozdiver's Avatar
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    Re: Raising CH

    So your's rises due to replacement of evaporated water with hard water?
    In Houston we get a lot of rainfall, so often mine is topped up that way.
    This time of year the autofill adds a little.
    Obviously my pool is young (3 months) but mine has been locked at 225 since I filled it.
    40k gal freeform, IG pebblesheen, 9'x'6' raised spa, 2-1/2 hp Whisperflo, 520 sq/ft cartridge, Legend w/ booster, Intellibrite 5g in pool @ spa, Rainbow 320 Chlorinator(retired),
    Mastertemp 400k BTU, 3x3 hp Whisperflo Swimjets, 2x2 hp Whisperflow for 15ton moss rock waterfall, Intelitouch Controller, 850 sq/ft Travertine deck, Gas/Wood firepit,
    Autofill, TF-100 test kit w/ SpeedStir

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    Mod Squad jblizzle's Avatar
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    Re: Raising CH

    Yes. My tap water is about 130ppm. I did a complete refill 2.5 years ago and my CH is now 450ppm.

    While the CH was low, I just kept the pH a little higher to keep the CSI in range. Now I have to try to keep the pH on the lower side. Likely will have to replace the water again in a year or so as the CH gets higher than I want.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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