Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Indentation in AGP floor

  1. Back To Top    #1
    gboulton's Avatar
    Join Date
    Apr 2012
    Location
    Nashville, TN
    Posts
    380

    Indentation in AGP floor

    High gang.

    Rather disturbing finding today.

    Between the skimmer and single eyeball return (approx a 3-4' distance between the two), about 18-24" in from the wall, a small indentation has appeared in the floor of our new (less than a month old) pool.

    The indentation is about 2-3" deep, more or less oval in shape, probably the size of a softball or so. The liner has settled into it and formed right up to it, no wrinkles or anything. I looked and felt around, no tears or anything I can feel or see, and water level hasn't changed (other than as described below).

    Yesterday, after vacuuming the pool, I lost siphon on the skimmer, and had to bleed air from the basket in front of the pump, by releasing the plastic lid on top, and then locking it back down. The O-Ring wouldn't seal back up well for me, and by the time I could get everything sorted out, and get the lid back on correctly, I'd lost maybe 3/4" of water from the pool.

    Obviously, the great O-Ring disaster of 2012 occurred right by where this indentation has happened.

    I'm presuming, given how new things are, that some backfill just hadn't settled completely, and the water eroded some away, allowing a bit of a collapse under the pool. I didn't find any obvious holes or soft spots out there, even after pulling a bit of dirt away and probing with my hands. Never the less, I pulled stuff away for 3-4' around the out of the pool, down about 4" or so, packed everything down again, and brought another couple wheelbarrows full of dirt into the area, building up a good "ramp" away from the pool edge.

    So...questions:

    Is there anything else I can or should do at this point?

    Is our liner already doomed, or are we simply going to have a small little dent there forever more?

    Anything in particular I should be looking for that would be indicative of larger problems? If so, what would the correct response be if I see them?
    -Gordon
    Pool School helps me maintain my 13,500G 24' x 48" ASP with Sand Filtration using a TF100 Test Kit and Pool Calculator.
    Remember, the Shock Process should be followed until : 1. CC is less than 0.5 ppm, 2. An OCLT shows a loss of 1.0 ppm or less and, 3. The water is crystal clear.
    --I didn't buy my pool to swim in it. I bought my pool to watch my wife swim in it. :wink:

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Indentation in AGP floor

    There isn't anything you can do at this point unless you feel like draining the pool.

    As long as the depression has fairly smooth sides (no sharp edges) everything should be fine (aside from the bottom not being flat).

    If this only happens in one spot, I wouldn't worry about it. If it starts happening repeatedly, it might be animal burrows collapsing in or unstable soil washing out, any you might well have to do something about it.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    gboulton's Avatar
    Join Date
    Apr 2012
    Location
    Nashville, TN
    Posts
    380

    Re: Indentation in AGP floor

    Fair enough...kinda what I was expecting to hear. *heh*

    Thanks for the info.
    -Gordon
    Pool School helps me maintain my 13,500G 24' x 48" ASP with Sand Filtration using a TF100 Test Kit and Pool Calculator.
    Remember, the Shock Process should be followed until : 1. CC is less than 0.5 ppm, 2. An OCLT shows a loss of 1.0 ppm or less and, 3. The water is crystal clear.
    --I didn't buy my pool to swim in it. I bought my pool to watch my wife swim in it. :wink:

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •