Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: First Test Numbers

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    NE Ohio
    Posts
    9

    First Test Numbers

    After a long weekend of heavy pool use I did my first official test last night. I received my test kit on 7/2 and tested, but that was only 3 days after adding stabilizer and I wanted to wait a full week.

    7/2
    FC 5
    CC 1
    TC 6
    TA 140
    CYA 43
    PH 7.2

    7/6
    FC 8
    CC 0
    TC 8
    TA 150
    CYA 58
    PH 7.5

    In previous years I would automatically shock after a long weekend with high temperatures, but I held off last night. If I understand the test correctly, my numbers are pretty much on target with the exception of a high FC which should lower on its own. Am I reading this right?
    In Ground, 20 x 40 Grecian, ~35,000 g, Vinyl, Sta-Rite System 3 DE Filter, Chlorine

  2. Back To Top    #2
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,723

    Re: First Test Numbers

    Great job!

    Looks like you are close to being spot on.

    Your TA looks a little high. You might want to lower it to around 100 or so.

    Look how great the TFP way works and saves you money! Testing is power!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  3. Back To Top    #3
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: First Test Numbers

    Nice work

    Your FC last night was about perfect, NOT high

    With a CYA of about 60, keep FC between 5 and 9, and never below 5.

    So, each evening dose the pool up to 8 or 9 FC. The next evening, make sure it has stayed at 5 or more. You may need to play with this a little until you learn what your pool's FC appetite is.

    About that TA, each time the pH reaches 7.8, lower it back to 7.2 with muriatic acid. By the by, the TA will lower.

    No need to do anything special unless you are having to lower pH so often that it is annoying.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4

    Join Date
    Jul 2014
    Location
    NE Ohio
    Posts
    9

    Re: First Test Numbers

    Thank you for your input.

    Just so I understand the BBB method correctly - say when I test tonight the CH comes up at 4. If my target CH is 8 I would add a little under 2 gallons of 8% bleach, directly in front of the return?
    In Ground, 20 x 40 Grecian, ~35,000 g, Vinyl, Sta-Rite System 3 DE Filter, Chlorine

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: First Test Numbers

    Quote Originally Posted by hende View Post
    Thank you for your input.

    Just so I understand the BBB method correctly - say when I test tonight the CH comes up at 4. If my target CH is 8 I would add a little under 2 gallons of 8% bleach, directly in front of the return?
    That's it. I come up with 1.7 jugs.

    It's really just that simple. When pH climbs to 7.8, add acid to get it back down to 7.2. Just space the chemical additions apart at least half an hour.
    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!

  6. Back To Top    #6

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: First Test Numbers

    Welcome to the forum Hende

    No need to shock with your numbers. If you maintain the proper FC level for your CYA level your pool will stay sanitary, clear and sparkly. If you know you're going to have extra bathers you can always bring that FC level to the high end as you know a lot of it will be used but shocking afterwards isn't necessary and is just extra work and $$ you don't need to spend.

    From this table in "Pool School", http://www.troublefreepool.com/conte...art-slam-shock (tab at top of page) you can see for a certain level of CYA you need a minimum of "X" chlorine and then it gives you a target level. You want to be around the target but not drop below the minimum. Below the minimum is where algae starts and also there isn't enough chlorine to kill the "stuff" you want killed that's floating around in the pool. This is where pool stores get it wrong as they will usually say if you have 1-3ppm FC you are good. Well you are if you have low CYA but if it's higher like yours (and mine) 1-3ppm isn't going to keep you algae free and your water may look crystal clear and clean but there can easily be things in there alive that shouldn't be.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

Posting Permissions

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