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Thread: Waterfall stone mortar leaves residue on tile

  1. Back To Top    #1

    Join Date
    Jul 2015

    Waterfall stone mortar leaves residue on tile

    I'm a newbie to this forum. I don't have a pool but my sister does and I am trying to help her out. She has large rocks/stones piled up in the back of the pool with a waterfall. There is a scaly, rough, white material that has built up on the pool tile directly under the stones that appears to be wash out from the material holding the stones together. She has tried many different products like acids and CLR but nothing has helped. Can anyone recommend something that could remove this?
    Thank you

  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: Waterfall stone mortar leaves residue on tile

    Diluted muriatic acid should remove it. Start at 10 to 1 and work up as needed.
    TFP Moderator
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