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Thread: Calcium deposit line on blue tiles around pool.

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    Calcium deposit line on blue tiles around pool.

    I just had my plaster pool acid washed and replaced the sand in my sand filter. I am in Phoenix and the water is so hard you can walk on it. Now that the plaster is clean and I am going to use liquid chlorine to avoid powder shock, how can I remove the white build up on my tiles and keep it off. Is there a reliable product? Beautec maybe??

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    Mod Squad jblizzle's Avatar
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    Re: Calcium deposit line on blue tiles around pool.

    Welcome to TFP!!!

    To remove the build-up, you can use a water/muriatic acid solution and scrub it off. Or have it soda/bead blasted off.

    There is no way to prevent it from coming back because it is the deposits left when water evaporates ... and we have a lot of that around here.
    Jason, TFP Moderator
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    Re: Calcium deposit line on blue tiles around pool.

    Thanks. I tried the acid scrubbing with little success. I just learned of the bead blasting. Too late now since I just drained and refilled.

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    Richard320's Avatar
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    Re: Calcium deposit line on blue tiles around pool.

    A pumice stone, elbow grease, and Motrin will remove it. Sounds awful -- fingernails on a chalkboard times 10 -- but it doesn't seem to mess up the tiles.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Mod Squad jblizzle's Avatar
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    Re: Calcium deposit line on blue tiles around pool.

    You can have it soda or bead blasted while full. The soda will just raise the TA/pH a little or the beads are removed from the pool by the contractor.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Calcium deposit line on blue tiles around pool.

    Thanks. I tried the acid scrubbing with little success.
    If acid didn't get it, it may not be calcium. What strength and dilution did you use? Did the white buildup foam up when you applied the acid?
    Dave S.
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    Re: Calcium deposit line on blue tiles around pool.

    Quote Originally Posted by duraleigh View Post
    If acid didn't get it, it may not be calcium. What strength and dilution did you use? Did the white buildup foam up when you applied the acid?
    Huge +1 to this. I have a metric "buttload" of dark blue tile...I've come rather accustomed to acid washing the tiles due to Jesus rated water. get a dropper of straight MA see if that foams on the "calcium". if it doesn't, it's not Calcium.
    IG gunite/plaster pool/spa Started 1/17/14, Plastered 5/16/14
    Size: 12'-21'x39' free form, depth ranging from 4' to 7, attached 6 person spa with spillover.
    Equipment: Whisperflo 2hp pump, Pentair 30" sand filter, Pentair Mastertemp 400k BTU heater, 1hp Whisperflo for waterfalls, and a blower for spa floor

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