Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: older fiberglass, thinking a remodel

  1. Back To Top    #1

    older fiberglass, thinking a remodel

    I have a 35 yr. old san juan fiberglass in ground that needs resurfacing. I have an issue with cobalt staining now, will it be resolved with a new resurface? I am thinking of using a salt water system with my DE filter and pump.
    Thanks

  2. Back To Top    #2

    Re: older fiberglass, thinking a remodel

    Thinking of referbing my 41 year old fiberglass san juan pool as well.

    Does it make a difference if the sides bulge?
    1971 San Juan Fiberglass pool 12,000 gallons
    New Pentair Whisperflow 1hp
    New Pentair FNS DE filter 64sq
    All 1.5" piping and no heater
    1 skimmer, 1 main drain, and 2 returns

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: older fiberglass, thinking a remodel

    WTP, Welcome to TFP. You have come to the right place.

    Cobalt staining is caused from water balance issues. Learn to maintain your water chemistry correctly by reading Pool School and your new finish won't have the staining issues.

    Where are you located and do you use well water or public water?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: older fiberglass, thinking a remodel

    Cobalting is what happens when old resin in fiberglass breaks down. It must be completely stripped down, all blisters ground out and filled. Even then, it might do it again. I have a customer with one too.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  5. Back To Top    #5

    Re: older fiberglass, thinking a remodel

    Public water supply. The surface has been ground down and new fiberglass sheets added. I wonder if after adding water I should use a chemical to remove any mineral traces?

  6. Back To Top    #6
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: older fiberglass, thinking a remodel

    Since it's public water you can get an assay (water report) from the authority in charge. Some places even have them online. That'll tell you if there's anything you need to worry about.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

Posting Permissions

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