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

Thread: Odd FC

  1. Back To Top    #1
    tcat's Avatar
    Join Date
    May 2012
    Austin, TX

    Odd FC

    My auto chlorinator slowed down on me, so I started to get some algae on fittings. I slammed and all is well. One "odd" thing I noticed while holding FC at 18, is when my sample turned clear, it would keep turning pink after a few seconds. Add a drop, and is clear for a few, then oozes to pink again. Normally once it turns clear it stays there. Could it be the powder keeps dissolving in cold water? Pool is at 45 degrees, but I would think sample would warm up fairly quickly. Anyway, waiting for FC to get back down to 5 (it's still at 16 after 2 days)... cold water and clouds makes for real slow chlorine degradation!
    IG pebble, 15,000 gallon
    48” PentAir DE Filter with backwash valve
    PentAir Whisperflo pump with 1hp 2-speed motor
    Aquabot 4WD, Poolskim
    Intermatic Dual Timeclock with freezeguard
    DIY chlorine feed

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Odd FC

    It's normal for the sample to turn back pink if you let it sit several seconds. Don't worry about it.
    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

  3. Back To Top    #3
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: Odd FC

    +1 on Bama's response. Perfectly normal.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

Posting Permissions

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