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Thread: Painted pool - do I still need to add calcium?

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    Painted pool - do I still need to add calcium?

    I've read that you need to add calcium to the pool if it is plaster. My pool is painted. Do I still need the calcium?
    Pool: In-ground; 18,500 gallons; painted concrete (I think -- it was built in the 1940s); Triton II Sand Filter, pre-1991; Hayward Super Pump II; Pentair heater

    Spa (separate): in-ground; cartridge filter, 3 Hayward Super Pump IIs (1 for circulation, 2 for jets);Pentair heater

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    Re: Painted pool - do I still need to add calcium?

    What is your current Calcium Hardness?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Painted pool - do I still need to add calcium?

    About 150
    Pool: In-ground; 18,500 gallons; painted concrete (I think -- it was built in the 1940s); Triton II Sand Filter, pre-1991; Hayward Super Pump II; Pentair heater

    Spa (separate): in-ground; cartridge filter, 3 Hayward Super Pump IIs (1 for circulation, 2 for jets);Pentair heater

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    Re: Painted pool - do I still need to add calcium?

    That's after putting in about 2-25 lb containers of Hardness Plus from Leslie's over the course of the last 4 weeks or so.
    Pool: In-ground; 18,500 gallons; painted concrete (I think -- it was built in the 1940s); Triton II Sand Filter, pre-1991; Hayward Super Pump II; Pentair heater

    Spa (separate): in-ground; cartridge filter, 3 Hayward Super Pump IIs (1 for circulation, 2 for jets);Pentair heater

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    Re: Painted pool - do I still need to add calcium?

    I believe you have enough. Your pool is not really a masonry pool once you paint the masonry. I think it's still a pretty good idea to have some in there and you are not quite to what we suggest (250-400) for masonry pools but close enough for your situation.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    aussieta's Avatar
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    Re: Painted pool - do I still need to add calcium?

    painted pool finish is weaker than plaster
    if you let the csi go negative at all your paint will chalk
    needs to be kept slightly positive +0.1 to +0.3
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

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    Re: Painted pool - do I still need to add calcium?

    A painted pool will chalk regardless of any attempt to prevent it with pool chemistry. It simply chalks.....they all do.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Painted pool - do I still need to add calcium?

    Wouldn't the recommendation also depend on the age/condition of the paint? For example, we sometimes swim in a family member's pool - the pool is old, as is the OP's pool. The paint on the concrete is younger than the pool itself, but, judging by appearance, it's hard to believe the paint is providing much protection to the underlying concrete...
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

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