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Thread: 1st post and 1st TF-100 check

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    1st post and 1st TF-100 check

    FC 12.5
    CC 0
    pH 7.5
    TA 110
    CH 225ppm
    CYA 110
    Water clear since initial 4 day clear up after opening 5 weeks ago. I'm going to drain some water off to get my CYA down so I can quit using so much chlorine. Suggestions welcome!
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Re: 1st post and 1st TF-100 check

    Welcome to the forum.

    I see nothing to change in your pool chemistry or plan to reduce CYA. If you chlorinate with an SWG, take CYA down to around 70. If you chlorinate any other way, take CYA down to 50 ppm.

    You have a good grasp of all the concepts. With your already clear water, you'll have a Troublefree summer!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: 1st post and 1st TF-100 check

    THANKS! I'll be shooting for 50.
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: 1st post and 1st TF-100 check

    That looks good!
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: 1st post and 1st TF-100 check

    Any suggestions on how far to drain this 12 year old faded out liner. I'm hearing a foot below the skimmer to a foot in the shallow end. I started yesterday pulling from the main drain with 2 hoses filling at the same time thinking I wouldn't be pulling the fresh water. I've been told a foot below the skimmer to a foot deep in the shallow end. Also been told to watch the liner at the corners at the top and bottom to make sure it's not pulling away from the wall or lifting from the bottom.
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: 1st post and 1st TF-100 check

    Yes, those are the guidelines. Maybe err on the side of caution with the older liner and go a foot or 18" below the skimmers.
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: 1st post and 1st TF-100 check

    Thanks! Seems I've read that it can take a week to get an accurate CYA reading after draining and refilling. Is that correct?
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: 1st post and 1st TF-100 check

    Close. It takes a week for newly added CYA to fully dissolve and show up on the test. For a drain and refill just run the pump for 30min after it is full to mix the new and old water and test.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: 1st post and 1st TF-100 check

    Thanks again!
    33,000 gallon, IG vinyl, Nautilus FNS PacFab DE filter (7, 12 in grids and 1 partial), 1HP Hayward Super Pump Mod#SP2607X10, 3\4HP Polaris PB4-60 Booster Pump, Well Water, TF-100 Test Kit

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