Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: TF-100 testing of water from hose

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Boston, MA
    Posts
    58

    TF-100 testing of water from hose

    Just received my test kit today. Pool is scheduled for a Wednesday installation, but weather doesn't look like it is co-operating. Decided to check the water coming out of my hose to get a rough idea of starting point.
    Chlorine was clear/nothing.
    pH looked to be about 6.8, very yellow
    TA about 30-40
    Didn't bother with CYA as it should be 0.

    I have 8.25% bleach (2 bottles @121 oz each) waiting...according to Pool Math I should need about 90oz to start.
    I have HTH CYA ready to go, 80 oz needed. (have 2 4lb containers)
    I was not able to find Borax this weekend, but will try and find that or soda ash tomorrow.
    Now, according to Pool Math I need 247 oz of baking soda. Is that right? I bought a 12 lb bag, but looks like I'll need more.
    That seems like a lot.

    What order should I add as I see baking soda will raise pH a little. I know CYA takes a while to dissolve so I guess I should get that in ASAP.
    What are safe levels of everything to let the kids start swimming?
    24'x 54" Round Sharkline Oceanic installed summer 2014,Hayward EC45 bump style 1.5hp DE filter (using cellulose),TF-100 test kit. First time Pool owner- thinking about SWG

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: TF-100 testing of water from hose

    Adjust the TA up to 70 to 90 first. Then test the PH again and adjust as needed to get into the 7.5 to 7.8 range. After that you can start adding CYA, and then 2 ppm of chlorine. That is enough to start swimming.

    Start adjusting FC based on the CYA level on the next day and continue adjusting any other levels as needed.
    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

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: TF-100 testing of water from hose

    Raise the TA with baking soda to about 70ppm.
    Wait 30 minutes and check the pH and adjust into the 7s as needed.
    Get the CYA dissolving and 1-2ppm of FC in the water.

    As soon as there is some FC in the water it is safe to swim ... best to wait 30 minutes after any chemical addition (besides the CYA which is safe to swim while it is dissolving in a sock).
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: TF-100 testing of water from hose

    Soda Ash/Washing Soda will also raise TA a lot. Check Effects of Adding Chemicals down low on poolmath to get a close approximation of what that will be. You might not need any more baking soda.

    In order: pH. CYA in a sock in the skimmer. Recheck and adjust pH again if needed. When it's good, add bleach to get to 3 FC or so, since you will only have a trace of CYA, if any, in the water. You can toss the baking soda in last and let the kids have fun pouring it on themselves or whatever. As soon as the chlorine cloud is dispersed, it's okay to get in.

    The critical things are pH between 7.2 and 7.8 and FC above minimum for your CYA level. If you brush a few swipes each way to get some serious currents going in the pool, the chemicals will mix faster. Typically half an hour of pump running between doses is enough.
    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!

  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Boston, MA
    Posts
    58

    Re: TF-100 testing of water from hose

    Thanks all...I hadn't seen the Effects of Adding Chemicals at the bottom of Pool Math before!
    24'x 54" Round Sharkline Oceanic installed summer 2014,Hayward EC45 bump style 1.5hp DE filter (using cellulose),TF-100 test kit. First time Pool owner- thinking about SWG

Posting Permissions

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