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Thread: New Pool - First TF-100 Numbers

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    MA
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    New Pool - First TF-100 Numbers

    First post here. We bought an 18' x 48 " Intex Ultra Frame and I finished the install about a week ago. I bought the 2650 sand filter along with the SWG and so far everything is working perfectly! The most difficult part of the install was the leveling of course. The ground was off by 10" in the location I selected. After reading all of the warnings about making sure it was level, I really tried to get it perfect. So far it is remaining that way so that's great! Anyway, that's for another post.

    I used the included strips initially until my TF-100 kit arrived. I tested on the day that I received it and made a few additions. Also note that I did not fill to capacity. I filled it to the bottom of the 2nd square from the top on the liner so it would be up to my son's chin. Filled from the hose with town water (no well). The water is sparkling clear and seems perfect to the eye and to swim in! I really want to learn to keep it this way.

    I used 7200 gallons (7600 full I believe) on the pool calculator but don't know how accurate that is. Here are the results after my first "true" test:

    FC 4.5
    CC 0.5
    TC 5.0
    CH 50
    TA 110
    CYA 50
    pH 7.5
    Salt was just below 3000 ppm with stick test

    What I'm thinking is that my TA is a bit high and I need to bring the CYA up a bit to about 70. Am I on the right track? Any recommendations?

    Thanks a lot!
    Al
    Attached Images Attached Images
    2014 Intex Ultra Frame 18 x 48 (7000 gallons)
    2014 Intex SWG
    TF-100 Test Kit

  2. Back To Top    #2
    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    18,768

    Re: New Pool - First TF-100 Numbers

    Welcome!

    Yeah, raise the CYA a little and monitor the FC. You'll likely be able to run SWG less and still maintain adequate FC with the higher CYA. Note that as CYA rises, so does the minimum FC.

    I wouldn't touch the TA. CYA is acidic, so some of that TA will go away when you add that. And if you just lower pH whenever it hits 7.8, the TA will come down on its own. As it says in the article on lowering TA, " You shouldn't lower TA just to reach a target number."
    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!

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    Join Date
    Jul 2014
    Location
    MA
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    2

    Re: New Pool - First TF-100 Numbers

    Thank you! This is our first pool and I think that I read so much before hand that I expected it to be difficult from the start. It's been too easy since the water went in! I'll get the CYA up a little bit this week and monitor. We did have some bad storms come through here yesterday that added about half an inch to the pool. Should I do anything special? I did set the SWG to run for 6 hours this morning (normally 4 hours, our pool is in the sun from sunrise to sunset) thinking a little extra chlorine may be needed.

    Thanks again for replying. I've used this forum a lot since we decided to get the pool and it's been a big help!
    2014 Intex Ultra Frame 18 x 48 (7000 gallons)
    2014 Intex SWG
    TF-100 Test Kit

  4. Back To Top    #4
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
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    8,495

    Re: New Pool - First TF-100 Numbers

    No, nothing special after rain unless you need to drain water. The biggest problem with rain is that folks don't want to get wet. As Richard's signature says "A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!". On rainy days many people tent to skip testing. Put a few rainy days together and many times you end up with something growing in the water because of no FC. Once you get the SWCG dialed in and get used to your pools appetite for chlorine and maybe acid you may be able to skip a day or two here or there. But you really want to target at least testing FC & pH every day.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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