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

Thread: White spots in pool plaster and spots in spa plaster?

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    White spots in pool plaster and spots in spa plaster?

    We bought the home in April and these spots in both the pool (on the sitting ledge of shallow side) and the spa (one side of the sitting area) have always been there. Can anybody tell me what is the cause of these spots?

    1) The white spots in the pool appear to be right in the top layer of the plaster, but actually IN the plaster as opposed to on top of the surface of the plaster. The actual plaster surface isn't messed up though, it's still smooth, just with white spots.

    2) The spa spots are a little different. These spots actually have made a few degraded surface holes in the plaster (only about 1/16" into the surface).

    When we moved in, I immediately ordered a kit and began gaining as much knowledge (from this site) as I could to maintain the pool myself. My calcium hardness was low, I think it was a little over 100, maybe 150 at the most. Since then I've bumped it up and keep it in the 300-350 range.

    Do you guys have any idea what these spots are from? Do you think it has anything to do with the low calcium levels (the previous owners always paid a pool guy to maintain, so they were probably getting screwed and he wasn't doing that good of a job)? Could it be that the white spots in the pool plaster were caused by something else as opposed to the spots the degraded in the spa plaster? Can any of this be fixed or remedied? It doesn't really bother me too much because it's minimal, but just thought I'd ask you guys opinions. Thanks!
    15k Gallon In Ground Saltwater Gunite Pool and Spa w/ Overflow
    Dolphin Nautilus Plus Pool Cleaner
    Main Filter Pump - 1.5HP Pentair Whisperflo connected to Triton II Sand Filter
    Spa Pump - 2HP Pentair Whisperflo w/ 2HP Polaris Spa Air Blower
    Resilience PSC3 SWCG

  2. Back To Top    #2

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    Re: White spots in pool plaster and spots in spa plaster?

    Anybody have any ideas?
    15k Gallon In Ground Saltwater Gunite Pool and Spa w/ Overflow
    Dolphin Nautilus Plus Pool Cleaner
    Main Filter Pump - 1.5HP Pentair Whisperflo connected to Triton II Sand Filter
    Spa Pump - 2HP Pentair Whisperflo w/ 2HP Polaris Spa Air Blower
    Resilience PSC3 SWCG

  3. Back To Top    #3
    Rsmith's Avatar
    Join Date
    Apr 2016
    Location
    Central Md.
    Posts
    107

    Re: White spots in pool plaster and spots in spa plaster?

    Central Md. 37 X 21 24K IG Custom Gunite with Anvil Quartz finish. Raised Spa.
    Sta-Rite Natural Gas Heater. Intellichlor IC-40 SWG, Sta-Rite 450 sq ft. Cartridge Filter.
    Pentair 1.5 Hp Variable Speed Pump. TF100. Dolphin Z-5. First swim 5/26/16

  4. Back To Top    #4

    Join Date
    Apr 2016
    Location
    Youngsville, LA
    Posts
    272

    Re: White spots in pool plaster and spots in spa plaster?

    Quote Originally Posted by Rsmith View Post
    Great read, but the ones in the spa aren't nodules/bump. They are actually holes were the plaster looks degraded.
    15k Gallon In Ground Saltwater Gunite Pool and Spa w/ Overflow
    Dolphin Nautilus Plus Pool Cleaner
    Main Filter Pump - 1.5HP Pentair Whisperflo connected to Triton II Sand Filter
    Spa Pump - 2HP Pentair Whisperflo w/ 2HP Polaris Spa Air Blower
    Resilience PSC3 SWCG

  5. Back To Top    #5

    TFP Guide

    In the Industry

    Join Date
    Apr 2015
    Location
    tucson, arizona
    Posts
    943

    Re: White spots in pool plaster and spots in spa plaster?

    OnBalance
    , These group of people have studied pool plaster like no one else

  6. Back To Top    #6
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,998

    Re: White spots in pool plaster and spots in spa plaster?

    That sounds like etching. With low CH and very negative CSI the plaster will dissolve calcium into the water. More here, Pool School - Calcium Scaling
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  7. Back To Top    #7

    Join Date
    Jul 2011
    Location
    Arizona & California
    Posts
    771

    Re: White spots in pool plaster and spots in spa plaster?


Posting Permissions

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