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

Thread: FC at 40. Too high for fiberglass?

  1. Back To Top    #1

    Join Date
    Oct 2010
    Location
    Eastern TN
    Posts
    172

    FC at 40. Too high for fiberglass?

    I'm trying to kill algae. FC measured 40 this a.m. How high can I go before it damages fiberglass pool? Metal steps have not been installed yet.

    SWG has been used along with bleach to get FC up. Usually SWG is on 5% for 5-7ppm. Can I leave it on 100% for 2 days to maintain high levels w/o hurting it?
    Plaster pool inground 22,000 gallons with spa. Pentair Intelliflo, IC40 salt generator, WiFi control/Easy Touch.
    Hayward 1.5 HP pump on 750 gallon spa. Sand filters. Auto chlorinator on spa. Auto water level. Dolphin M500. TF100 XL with Speed Stir. Apera Instruments AI311 PH60 Premium Waterproof pH Pocket Tester

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,421

    Re: FC at 40. Too high for fiberglass?

    What is your CYA?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: FC at 40. Too high for fiberglass?

    It all depends on your CYA level.
    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

  4. Back To Top    #4

    Join Date
    Oct 2010
    Location
    Eastern TN
    Posts
    172

    Re: FC at 40. Too high for fiberglass?

    Cya 75-80
    Plaster pool inground 22,000 gallons with spa. Pentair Intelliflo, IC40 salt generator, WiFi control/Easy Touch.
    Hayward 1.5 HP pump on 750 gallon spa. Sand filters. Auto chlorinator on spa. Auto water level. Dolphin M500. TF100 XL with Speed Stir. Apera Instruments AI311 PH60 Premium Waterproof pH Pocket Tester

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: FC at 40. Too high for fiberglass?

    With CYA that high you are fine, there isn't any risk of damage.
    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

  6. Back To Top    #6

    Join Date
    May 2011
    Location
    lebanon tn
    Posts
    370

    Re: FC at 40. Too high for fiberglass?

    I don't think you'll damage the SWCG, but will reduce life of the cell...
    I think most people shut it down and use bleach to shock
    24ft x 52in AGP 18000 gal
    sand filter, 200#,1.5 hp single speed pump
    Wood deck (still in progress...)

Posting Permissions

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