Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: New plaster feels granulated!

  1. Back To Top    #1

    Join Date
    Jun 2008
    Location
    France
    Posts
    18

    New plaster feels granulated!

    Last year the pool (inground concrete) was totally resurfaced with plaster (sprayed on after old had been scraped back and new applied about half-inch thick, then smoothed over to finish.) Now, 18 months later, it's possible to just rub your finger lightly over the surface (underwater) and tiny particles will float off - they feel like finely granulated sugar. The pool has never been emptied since it was relined and I'm not sure if this will be a serious problem, go away or whatever! (pH constant 7.4, bromine pool)
    Inground Gunnite pool 30'x15' - 10mx5m
    22,500 US Gallons / 85 Cubic M.
    Hayward 3/4 hp Triton Sand Filter 220lbs - 100kg
    Auto pH ColorQ Test Kit

  2. Back To Top    #2
    Guest

    Re: New plaster feels granulated!

    Without a full set of test results we really can't tell anything but I suspect your water chemistry was off and that allowed scale to form.

  3. Back To Top    #3
    tsunami's Avatar
    Join Date
    Sep 2008
    Location
    Oceanside, CA
    Posts
    138

    Re: New plaster feels granulated!

    Did you brush the pool for the first 2 weeks after plastering?
    40 X 26 Free Form Pool with attached 9 X 7 Spa raised 18" with 8 Jets and Spillover, and an Art Rock Waterfall/Grotto with accent rocks, 26,000 gallons
    Intelliflo VF-3050 for Pool, VS-3050 for Spa Jets, VS-3050 for Waterfall/Grotto, Quad DE 80, 400K BTU Mastertemp, Intellitouch i7+3 w/ iS10 10 Function Spa-Side Remote, Intellichlor IC40 Salt Chlorinator, Telephone Remote, 2 Intellibrites for Pool/ 1 for Spa, Solar Panels on 2 story Roof w/ 75% coverage
    Pebble Tec Tropical Breeze Tsunami's Pool Build

  4. Back To Top    #4

    Join Date
    Jun 2008
    Location
    France
    Posts
    18

    Re: New plaster feels granulated!

    Difficult to remember, but I think pool probably was brushed within two weeks....
    Inground Gunnite pool 30'x15' - 10mx5m
    22,500 US Gallons / 85 Cubic M.
    Hayward 3/4 hp Triton Sand Filter 220lbs - 100kg
    Auto pH ColorQ Test Kit

  5. Back To Top    #5
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,927

    Re: New plaster feels granulated!

    That may be normal for a new finish depending on how well you brushed the surface during curing. If it is not rough to the touch then is probably just plaster dust but post your test results just to be sure the water is not too aggressive.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  6. Back To Top    #6

    Join Date
    Jun 2008
    Location
    France
    Posts
    18

    Re: New plaster feels granulated!

    Today the tests are:
    Bromine 1.5
    pH 7.4
    Alk 60
    CH 266

    There is mild algae build-up on the walls which when brushed just slightly vanish - I shock usually about twice weekly because of the high UV factor and this clears algae. I was sold the idea of bromine by the dealer when he remade the lining. Never again and at the end of the season I'll empty and return to chlorine. I should have found this site earlier (but that's what they all say)
    Inground Gunnite pool 30'x15' - 10mx5m
    22,500 US Gallons / 85 Cubic M.
    Hayward 3/4 hp Triton Sand Filter 220lbs - 100kg
    Auto pH ColorQ Test Kit

  7. Back To Top    #7
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,927

    Re: New plaster feels granulated!

    Given your battle with algae, it could be dead algae. It is sometimes white is color and fine grit texture but I'm not sure if that happens in a bromine pool.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

Posting Permissions

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