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

Thread: CH Test Results

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Austin, TX
    Posts
    67

    CH Test Results

    Hi I'm curious which of these pics indicates the correct CH level. The first (more purple) photo is about 250, the dark blue is 300 and the last (bright blue) is 350. Normally, I had stopped when it was the 'dark blue', but recently I continued to add drops until it changed to the 'bright blue'.

    Thanks - John

    #1
    image.jpg

    #2
    image(2).jpg

    #3
    image(3).jpg

    #4
    image(4).jpg

    #5
    image(5).jpg
    12k gal IGP/Spa, gunite, Jandy 2HP ePump VSP, Jandy CL 460 Cartridge Filter, LXI400 Heater, PebbleSheen, Polaris 280, stenner 45MPHP10 auto chorine feeder

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: CH Test Results

    All drops based tests are completed when the last drop you add makes NO further color change. You then subtract that last drop from your total.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: CH Test Results

    You just keep adding until one of the drops has no effect on the color. With the CH test, massive amounts of mixing are required. Massive. When I switched from manual swirling to speedstir, I dropped about 200 ppm!

    So.. in your case, at 12, you're at dark blue. At 13, you're still at dark blue. At 14, it goes to light blue, the color you want to see. At 15, it stays light blue. No change at all. So the last drop did nothing. Subtract it. 15-1 is 14. Your CH is 350.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  4. Back To Top    #4

    Join Date
    Jun 2013
    Location
    Austin, TX
    Posts
    67

    Re: CH Test Results

    Ok - thanks for the replies! BTW -I am using speedstir, I couldn't live without it!
    12k gal IGP/Spa, gunite, Jandy 2HP ePump VSP, Jandy CL 460 Cartridge Filter, LXI400 Heater, PebbleSheen, Polaris 280, stenner 45MPHP10 auto chorine feeder

Posting Permissions

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