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Thread: Just began the conversion

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    Can Opener's Avatar
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    Just began the conversion

    I made the run to Costco yesterday (Sunday) for the bleach. Just picked up 8 large jugs. Two 182oz jugs for $5.54. Ran by the pool store for a Taylor K-2006 but they were closed. I began last night to take advantage of the evening.
    8/9
    2100- Add first bleach, 2.8gallons (two jugs)
    2230- 2 jugs
    2345- 1 jug

    Today: 8/10
    This morning the pool looked like a PHMB pool. Just a little cloudy. No color.
    0800- 2 jugs
    0930- 1 jug
    out of bleach and off to the pool store for the test kit.
    Picked up 20 large jugs.

    1400- 2 jugs

    1st test at 1500

    FC: 27ppm posting.php?mode=post&f=44#
    CC: 3ppm
    pH: 8

    RETEST with a 10ml 1/2 diluted test at 1545

    FC 27
    CC: 3

    At this point, I'm not sure if my test was off or if I've added too much bleach. My bad for not testing each and every time. It took 54 drops of 0871 at the 10ml level. I'll test again in another hour.
    History of the pool. I opened the pool last year in Aug. Added Soft Swim PHMB. Closed the pool in Sept for the winter. I opened the pool in June this year. The pool has had 32 oz of PHMB (Soft Swim B) and 6 gallons of H2O2 added this year. As of yesterday, all the PHMB chemicals were low. Is it safe to assume I don't have a large build up of chemicals in the pool?

    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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    JasonLion's Avatar
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    Re: Just began the conversion

    Can you give us some details about how you are testing the FC level? The FC level should be falling very rapidly on the first day of a conversion, so I suspect some kind of testing error.
    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

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    Can Opener's Avatar
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    Re: Just began the conversion

    I have the Taylor K-2006. I put 10ml of pool water in the vial, 2 scoops of power and the water turned pink and then cleared up. Instructions said to add 1 more scoop of power. Then, while swirling, it took 56 drops of 6071. FC of 27. I retested a short time later by adding 5ml of RODI water and 5ml of pool water. 1 drop of reagent should = 1 ppm of FC. It took 27 drops of 6071 reagent for the vial to turn from pink to clear.
    I thought the first day would consume a lot of FC also???
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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    Can Opener's Avatar
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    Re: Just began the conversion

    oops... I meant R0871. I just did a 3:1 test diluted test to save on the reagent. 7.5ml of RODI and 2.5ml of pool water. One scoop of powder and 11 drops of 0871. Wouldn't that yield a FC of 33ppm?
    I may be doing something wrong. I'll wait another couple of hours and test again. There is no cloudiness or color in the water. Pool has 14.2 gallons of 6% bleach in the past 18 hours.
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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    JasonLion's Avatar
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    Re: Just began the conversion

    When you are doing a 3 to 1 dilution, you multiply the result by 4. 11 drops becomes 44 drops, each of which counts as 0.5 of FC. That gives an FC reading of 22. Other than that, it sounds like you are doing the FC test correctly.

    I suggest doing a CYA test. If your CYA level is really high, it might account for what you are seeing. That is just about the only thing I can think of that could account for your results.
    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

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    Re: Just began the conversion

    2030 test
    FC 20
    CC 3
    pH 8
    TA-120
    CYA- 0
    The pool looks cleaner and clearer than ever. It has a sparkle it's never had. I'll wait till the morning to retest and see what's happened. Have you ever heard of a conversion taking 24-48 hours? Assuming I had very low residual of Baqa/Soft Swim, maybe it's possible.
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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    Re: Just began the conversion

    8/11
    0900 test
    FC 14; added 20 oz bleach to bring up to 15
    CC 3
    still no significant color change
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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    Can Opener's Avatar
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    Re: Just began the conversion

    1330 Test
    Mostly cloudy weather today.
    FC- 8 Added 1 gal, 2 cups to bring FC to 15
    CC- 2
    pH 7.4
    Should I be concerned with pH fluctuations while converting? Last pH was 8.0 but the FC was really high.
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

  9. Back To Top    #9
    JasonLion's Avatar
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    Re: Just began the conversion

    The PH will read higher than it actually is when the FC level is very high.
    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

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    Re: Just began the conversion

    Tested last night at 2130
    FC 13 Added 41 oz to bring FC to 15
    CC 2

    It rained most of the evening.

    This morning at 0830;
    FC 11
    CC 2
    pH 7.8

    Rained on and off most of the night.
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

  11. Back To Top    #11
    JasonLion's Avatar
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    Re: Just began the conversion

    Good! With an FC loss of only 4 overnight, you are get towards the end of the conversion.

    At this stage it isn't always worth maintaining the FC level during the day. Adding chlorine during the day will speed up the conversion, but it will also take a lot more chlorine than if you only add chlorine in the evenings.
    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

  12. Back To Top    #12
    Can Opener's Avatar
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    Re: Just began the conversion

    Thanks Jason for following the progress of my conversion. The pool clarity looks incredible. One day this summer, I thought my pool sparkled with the addition of $50 of Soft Swim chemicals. Boy was I wrong. And the clarity only lasted one day. I may be able to do the BBB method for just the cost of the amount of water I had to backwash daily with Soft Swim.
    last test at 1230
    FC 10 I brought the FC to 15
    CC 1t.
    From now on, I'll wait for sunset. It's not been great swimming weather this week anyway.
    Above Ground 9,800 gallons
    Soft Swim but ready to convert to BBB
    Hayward Sand Filter
    Raypack 2100 187k BTU
    Solar Cover

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