Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Pool won't hold chlorine!

  1. Back To Top    #1

    Join Date
    Jul 2014
    Norristown, PA

    Pool won't hold chlorine!

    Okay! So I got my TFT lot today and was very excited to use it!

    I already slammed my pool last week and now it will hold chlorine but not enough. Here are my numbers using my new TF-1000 kit today.

    ph= 7.8
    Fc= .5
    Cc= .5
    CH= 300
    TA= 90
    CYA= 30

    Each night I have been adding a gallon of Clorox Concentrated 8% (7.8% available) bleach. It gets up to 3PPM in the morning then by evening down to .5PPm

    Prior to this week and slamming the pool, my pool read 0 chlorine no matter how much chlorine I added. Finally slammed it and now it holds some chlorine but not enough.

    Why do you all do to keep the chlorine at 3PPM? Do you add bleach everyday like I am doing? Do you use pucks?

    I need help!

    Plaster, In Ground, 18000 Gallons. Pentair DE Filter (pentair fns plus de 48 sq ft filter), and a Pentair 3/4 HP Whisperflo Pump

  2. Back To Top    #2

    Join Date
    Mar 2014
    Las Vegas

    Re: Pool won't hold chlorine!

    2.5 ppm is not an excessive loss for a day. 2 is your minimum recommended level for your CYA. Since you are losing 2.5 ppm a day, you should probably target a level of 5 or 6. That way after you lose your 2.5 ppm you will still be above your minimum. And yes, we do add bleach every day.
    12000 Gallon IG Plaster built 2/15/2014. Jandy 340 sg ft 127 gpm filter, Jandy 1 HP stealth pump. Circupool RJ-45 SWG (overkill). TF-100 with Speed Stir.

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

    Re: Pool won't hold chlorine!

    Have you done an overnight FC loss test? Until you pass that test, you are not done SLAMing.
    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
    wjr75's Avatar
    Join Date
    Jun 2013

    Re: Pool won't hold chlorine!

    You probably want to raise your CYA up to at least 40ppm. I start the season with CYA in the mid 20's and add pucks to help with the liquid chlorine which also raises the CYA till mid summer when I hit the low 40's on CYA. I then go 100% liquid chlorine. Each puck adds about 1.7ppm CYA so I count them. I have a auto cover so early on I don't lose a lot to CL to sun when the cover is closed. When I'm at 30ppm CYA I keep my FC at 6ppm and when I'm at CYA of 40ppm I keep the FC at 7ppm. You may want to increase the upper end of your FC target everyday because your FC is dropping into the danger zone by the end of the day.
    Inground 22k gallon gunite 15x31 main pool, 15x7 wading pool/sunning deck, hot tub/with overflow (9' octagon with limestone top) & slide NSWG, Aqua Blue Pebble Sheen
    Filter dual cartridge Sta-rite 450sq/ft, TF-100 Test Kit
    Heater Raypak 2100 400k btu cupro-nickel exchanger
    Auto pool cover, Polaris 280 auto pool cleaner, Jandy AqualinkRS8 Remote Control System

Posting Permissions

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