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Thread: Thought i had this figured out...???

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    robaz's Avatar
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    Thought i had this figured out...???

    FC 3
    CC 0
    PH 7.8-7.2 ???
    TA 100
    CYA 50
    CH 300
    TEMP 68 Hello all...Happy Spring....Started bleach dosing with a stenner last Sept...CYA was 80..and was losing about 2-2.5 ppm /day of
    CL...Over the winter i drained about 80% to get the CYA down to 50 where it is now..The problem i have now is i'm losing about 5ppm from one evening to the next...Did my OCLT and it is 0 numerous times..Been adding acid all winter to keep the PH in
    check about 16- 32 oz./week of 14.5%..But my TA is still really high and the past week when i check the PH it reads 7.8 and
    the longer i leave it in the test vial the lower it gets..Goes down to about 7.2....I'm stumped???? Shouldn't the TA have come
    down being i added acid all winter long??? I never had this happen with the PH before...All reagents are fresh as well..
    Location: Phx,Az. IG gunite Pool constructed 1993 14x28 Playpool 3.5'/5'/4' depth.. 11,400 Gallons Finish: Acrylic Plaster (Ultra Poz) Tiled waterline Pump: 3Hp Pentair IntelifloVS Filter: Pentair TR100 Sand 4.91 Fil. area 74 GPM...Barracuda suction side cleaner........

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    Re: Thought i had this figured out...???

    Pool School has a great article on how to lower TA.

    Far more important is your FC loss which suggests organics(algae) in your pool. I cannot reconcile that with the zero OCLT results unless there is a testing error somewhere.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Casey's Avatar
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    Re: Thought i had this figured out...???

    How's your water look? What's your outside temperature? How much sun is the pool getting a day?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    robaz's Avatar
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    Re: Thought i had this figured out...???

    Water is crystal clear has been all winter...Ambient temps been between 80=90..Pool gets full sun all day
    Location: Phx,Az. IG gunite Pool constructed 1993 14x28 Playpool 3.5'/5'/4' depth.. 11,400 Gallons Finish: Acrylic Plaster (Ultra Poz) Tiled waterline Pump: 3Hp Pentair IntelifloVS Filter: Pentair TR100 Sand 4.91 Fil. area 74 GPM...Barracuda suction side cleaner........

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    Mod Squad pooldv's Avatar
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    Re: Thought i had this figured out...???

    Maybe you need to raise your CYA to find a sweet spot. Raise it 10 ppm and see how your FC does for a week or so. Maybe FC will hold better with CYA at 60 or 70.
    TFP Moderator
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    Mod Squad kimkats's Avatar
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    Re: Thought i had this figured out...???

    Each pool is so different. Our guidelines are just that guidelines......do some personal testing to see what YOUR pool likes the best and go from there. Keeping a log will be your best helper for finding your pool's sweet spot!

    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

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    Re: Thought i had this figured out...???

    being in AZ I think you were good with a CYA at 70 or so, lowering it I think is why you are seeing the CL being used during the day and not at night.. That is the only thing that makes sense from what your saying...

    TA will lower slowly the way your adding it, add when PH reads 7.5 down to 7.2 as much as you can, it will go fast at first but then slow down as the TA gets lower..
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    robaz's Avatar
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    Re: Thought i had this figured out...???

    Quote Originally Posted by cowboycasey View Post
    being in AZ I think you were good with a CYA at 70 or so, lowering it I think is why you are seeing the CL being used during the day and not at night.. That is the only thing that makes sense from what your saying...

    TA will lower slowly the way your adding it, add when PH reads 7.5 down to 7.2 as much as you can, it will go fast at first but then slow down as the TA gets lower..
    You lost me on this part...I've been adding acid all winter like i said...but the ph test goes from 7.8 to 7.2 when i agitate the the test cell..so i dont know what the ph actually is??
    Location: Phx,Az. IG gunite Pool constructed 1993 14x28 Playpool 3.5'/5'/4' depth.. 11,400 Gallons Finish: Acrylic Plaster (Ultra Poz) Tiled waterline Pump: 3Hp Pentair IntelifloVS Filter: Pentair TR100 Sand 4.91 Fil. area 74 GPM...Barracuda suction side cleaner........

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    Re: Thought i had this figured out...???

    So now I am confused

    Your saying your PH starts at 7.8 then goes down to 7.2.. what are you using to test? does it go down after it sits? look at this video at the 2 minute mark, is this what yours looks like?

    Pool School - pH Test



    here is what I was talking about lowering TA
    Pool School - Lower Total Alkalinity
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    robaz's Avatar
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    Re: Thought i had this figured out...???

    Quote Originally Posted by cowboycasey View Post
    So now I am confused

    Your saying your PH starts at 7.8 then goes down to 7.2.. what are you using to test? does it go down after it sits? look at this video at the 2 minute mark, is this what yours looks like?
    Yes thats exactly how it looks after about a minute or two sitting in the test cell..it starts out at 7.6 to 7.8 then it goes down to 7.2.. I'm using the same test cell as in the vid..I think you're right on the CYA i have 2 lbs of dichlorshock in the garage i'll dump in tonight to bring up the cya 10-11 ppm..maybe the CL will hold better..Thx Casey...............
    Pool School - pH Test



    here is what I was talking about lowering TA
    Pool School - Lower Total Alkalinity
    Location: Phx,Az. IG gunite Pool constructed 1993 14x28 Playpool 3.5'/5'/4' depth.. 11,400 Gallons Finish: Acrylic Plaster (Ultra Poz) Tiled waterline Pump: 3Hp Pentair IntelifloVS Filter: Pentair TR100 Sand 4.91 Fil. area 74 GPM...Barracuda suction side cleaner........

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    Re: Thought i had this figured out...???

    ok, I have never let it sit.. you should be reading it right after it is mixed and that is what you are at.. What is your TA at now?

    Adding the dichlor will work but it will also raise your FC, from the sounds of it that will not be a bad thing if your losing 5fc a day
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Mod Squad pooldv's Avatar
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    Re: Thought i had this figured out...???

    Correct, take the reading right after adding the reagent and mixing. Most water tests will change as they sit for a period of time.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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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    robaz's Avatar
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    Re: Thought i had this figured out...???

    ok i gotcha..dont let it sit...last year my cya was 200+ so i've been dumping water whenever i can..i guess i went too low with the az sun and all....I'll dump the 2 bottles of granular dichlor in tonight..and see if my FC holds any better...Like i said i did oclt 2 nights in a row with 0 CC so i think you're right about the low cya of 50 and the all day sun on the pool..My TA is at 100 which is where its been for some time.even after adding aciod all winter...maybe i'll try the acid/aeration thing to lower it..see if it stabilizes the PH a little more......thx for your help Casey....
    Location: Phx,Az. IG gunite Pool constructed 1993 14x28 Playpool 3.5'/5'/4' depth.. 11,400 Gallons Finish: Acrylic Plaster (Ultra Poz) Tiled waterline Pump: 3Hp Pentair IntelifloVS Filter: Pentair TR100 Sand 4.91 Fil. area 74 GPM...Barracuda suction side cleaner........

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