Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: new test kit user; need assisit

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Poway, CA
    Posts
    10

    new test kit user; need assisit

    Thanks for all the people who keep this site going!
    I have a gunite pool that over the winter developed some hard stuff
    on the sides. I just had it drained and polished and am starting up.
    The quartzscape finish is one year old already.
    My difficulty is that it is an outdoor pool with a cover on it. Some of the
    pool math is based on recommend FC levels depending on the CYA level.
    What level should I use? From research I'm leaning toward 20 ppm.
    Here are my startup levels:
    TC 1.5
    FC 2.5
    CC .5
    Ph 6.6 (should I add borax)
    TA 2400
    CH 200
    CYA 0
    I turned the SWG on with the filter but need to know when to add (how much) salt.
    Thank you!
    Inground; 4875 gal; automatic cover; Coates Model TR Heater;Pentair Intelliflo pump; Intellichor salt gen; Poolmiser auto fill; DE filter; gunnite

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: new test kit user; need assisit

    How often is the cover on it?

    You have some incorrect test numbers, I think. How are you testing?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    Poway, CA
    Posts
    10

    Re: new test kit user; need assisit

    The cover is on it 20-23 hours a day. I'm using the TF-100; which value should i repeat?
    Inground; 4875 gal; automatic cover; Coates Model TR Heater;Pentair Intelliflo pump; Intellichor salt gen; Poolmiser auto fill; DE filter; gunnite

  4. Back To Top    #4

    Join Date
    Jun 2015
    Location
    Raleigh
    Posts
    357

    Re: new test kit user; need assisit

    Quote Originally Posted by Poway View Post
    The cover is on it 20-23 hours a day. I'm using the TF-100; which value should i repeat?
    TC = FC + CC, so your TC cannot be less than FC

    Your alkalinity (TA) at 2400 is suspect...most pools are 150 or less

    Don't turn the SWG on until you add 3000 to 3500 ppm of salt

    With a SWG, you'll want to shoot for 60 to 70 CYA
    18' x 38' Pool, 3' to 8' Depth
    Vinyl Liner
    SWG
    Variable Speed Pump
    Sand Filter

  5. Back To Top    #5

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: new test kit user; need assisit

    That pH is crazy low, that should be brought up pretty quickly. CYA for a SWG should be 70-90. That TA is probably not right, but don't worry about that until you get your CYA and FC up.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  6. Back To Top    #6

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: new test kit user; need assisit

    TA can't be 2400. multiply the drops times 10. Could it have been 240?

    I think the TF-100 only goes to 6.8 pH Does it go as low as 6.6? (I can't remember)

    If you tested FC @ 2.5 ppm and then tested CC's @ .5 ppm then your TC needs to be 3.0 - let us know which is right.

    We'll help you get your pool straight but let's get your numbers right to get started
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  7. Back To Top    #7

    Join Date
    Apr 2016
    Location
    Poway, CA
    Posts
    10

    Re: new test kit user; need assisit

    Sorry guys I was using the test instructions off the site; but pulled the wrong kit instructions so my multiplier for Akilinity was off.
    TA is 120
    I tested FC and CC so adding those gives 3.0; but what is the value I put down was from the Daily test of K-1000; my mistake
    TC is 3.0
    I'm reading the PH also from the daily test of K-1000 also should I not record that either? Where else am I testing Ph?
    Inground; 4875 gal; automatic cover; Coates Model TR Heater;Pentair Intelliflo pump; Intellichor salt gen; Poolmiser auto fill; DE filter; gunnite

  8. Back To Top    #8

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: new test kit user; need assisit

    That is the only pH test. If you really think it's 6.6, just shoot for 7.0 for now, then retest.

    CYA is next, without any your FC will be used up in a day.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  9. Back To Top    #9

    Join Date
    Apr 2016
    Location
    Poway, CA
    Posts
    10

    Re: new test kit user; need assisit

    What will eat up the FC if the cover is in place?
    Inground; 4875 gal; automatic cover; Coates Model TR Heater;Pentair Intelliflo pump; Intellichor salt gen; Poolmiser auto fill; DE filter; gunnite

  10. Back To Top    #10

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: new test kit user; need assisit

    Well, I guess if you had a cover that completely shut out 100% sunlight, and had perfect water, nothing. But seeing how algae can grow even in ladders and behind pool lights, it doesn't take much sunlight to lose FC or let algae grow. Also, there is bather load; if you have a completely blacked out pool that never saw a swimmer I'm not sure what the point would be

    Side note, you need some CYA even if the pool is indoors, it is an important buffer.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  11. Back To Top    #11
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: new test kit user; need assisit

    Quote Originally Posted by Poway View Post
    What will eat up the FC if the cover is in place?
    Not much other than dust, debris already present in the pool if the cover is 100% UV blocking. Do you plan on having the cover on and never swimming in it? Even indoor pools should have 20 ppm CYA simply to moderate the strength of the hypochlorite and allowing more leeway with FC levels.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  12. Back To Top    #12

    Join Date
    Apr 2016
    Location
    Poway, CA
    Posts
    10

    Re: new test kit user; need assisit

    Nah...we will use it for swimming. I'm just doing startup is why there is no CYA. I wanted an expert opinion on what level to
    shoot for.
    Inground; 4875 gal; automatic cover; Coates Model TR Heater;Pentair Intelliflo pump; Intellichor salt gen; Poolmiser auto fill; DE filter; gunnite

  13. Back To Top    #13
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: new test kit user; need assisit

    I'd shoot for 40-50 ppm CYA to start with, assuming you will be covering it nearly all the time. If you're not happy with that, you can inch it up to more recommended levels for SWG pools. It's easy to work the CYA up higher, not so easy to work it down (drain/refill).
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

Posting Permissions

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