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

Thread: 1st time pool closer

  1. Back To Top    #1

    Join Date
    Apr 2015
    Location
    Boston MA
    Posts
    93

    Unhappy 1st time pool closer

    Hi everyone,

    Sadly, it's time.

    I've read the closing stickies...however, the SLAM process, specifically the SHOCK level has me confused.

    I plugged in the numbers in PoolMath...is it really that much chlorine???

    Also, I have a SWG, I must turn this off before I add the chlorine to observe the results?

    Thanks for all your help. I'm probably two weeks out, yet I want to have my ducks in a row.

    Much appreciated as always.


    15x30 Oval 13,500 Gal, IG Vinyl built Fall 2015,
    TF-100 test kit
    Pentair Sand Dollar 40 Pump & Filter System 1HP Dynamo
    Pentair Intellichlor SWG, Dolphin Nautilus

  2. Back To Top    #2


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: 1st time pool closer

    It is best to close when your water temperature is below 60 as algae has a hard time reproducing in cold water. Closing before you water gets to 60 is asking for a green swamp when you open. Usually many SWGs will stop producing chlorine before you water reaches 60 degrees, so you should be supplementing your FC until your pool gets cold enough to close. The good news is that you won't have to had much bleach during this time because there will be less for the FC to kill. So that is long winded whay of saying yes you turn your SWG off when you raise the FC levels to SLAM level.

    FC is buffered by CYA, so the high FC is tempered by the CYA. So a pool with FC of 2 ppm and zero CYA is much more harsh than a pool with FC of 24 and a CYA of 50. Pool School - Chlorine / CYA Chart
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

  3. Back To Top    #3

    Join Date
    Apr 2015
    Location
    Boston MA
    Posts
    93

    Re: 1st time pool closer

    Really got me here KC.

    If I go to poolmath and plug in Target FC (28) as suggested per Shock FC level for SWG= 480oz of 8.25% bleach? Would that be correct?

    Thanks for your help


    15x30 Oval 13,500 Gal, IG Vinyl built Fall 2015,
    TF-100 test kit
    Pentair Sand Dollar 40 Pump & Filter System 1HP Dynamo
    Pentair Intellichlor SWG, Dolphin Nautilus

  4. Back To Top    #4


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: 1st time pool closer

    What is your current FC and what is your current CYA?

    If I plug in your pool size and a current FC of 4 and target FC of 28, yes I get 480 oz or just shy of 4 gallons of 8.25% bleach.

    - - - Updated - - -

    If your CYA is 70, you should keep your FC near target of 5, letting it get down the minimum is asking for trouble. I tend to keep mine just above target so that I don't have issues on really hot days for days with a lot of action from my lab/otter mix.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

Posting Permissions

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