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    Vermiculite Mounds under liner

    Thank you. I tried hitting one small bump with a hammer and was able to flatten it. This one appeared to be sharp and almost piercing through so I’m going to apply a patch over it just to be safe. I think I’ll try hitting the other bumps with a mallet instead. I wonder why this happened and...
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    Vermiculite Mounds under liner

    Hi, had my IG pool liner removed and replaced late last year. During this summer I’ve noticed more than several small hard mounds under the liner. Most are along the downward sloping portion of the floor in the deep end. Some of these are smaller than a penny in size while others are larger than...