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Thread: new pool water balance, questions

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    new pool water balance, questions

    Here is my 1st real set of #'s for my pool water. It will be saltwater but there is none in yet for approx 1 week. I've added chlorine and some muratic acid to keep things "normal" but this was the first time I used the tf-100.

    fc 3

    cc 0

    tc 3

    ph 7.5

    ta 160

    ch 400

    cya 45

    temp 79.9

    The ch seems high? what is your expert opinions.

    thks Bob
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad zea3's Avatar
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    Re: new pool water balance, questions

    Yes the CH is a little high but still manageable as long as you keep your TA and pH low. Don't let the pH get any higher than 7.5, keep it around 7.2 if you can and try to lower the TA to around 70. With fresh plaster your pH will want to rise so you will need to stay on top of it. A SWG will also tend to make pH rise.
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    Re: new pool water balance, questions

    Thanks, used the pool calc and it said to add 500+ oz of baking soda to lower ta from 160 to 70. Thats approx 40 pounds, does that seem right? Also lower the ph to 7 / 7.2. Where do I get that much?
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad Bama Rambler's Avatar
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    Re: new pool water balance, questions

    I'm sure the PC didn't say to use baking soda to lower TA. That would raise TA. You use muriatic acid to lower pH and TA. Did you put 160 in the NOW column and 70 in the Target column?
    Dave J. TFP Moderator
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    Re: new pool water balance, questions

    Oops, I had them reverced, I saw the word "goal" above the box so I put 70 in the wrong coulmn. I'll add muratic acid to lower ph.

    thanks.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: new pool water balance, questions

    fc 1
    cc 0
    tc 1
    ph 7.5
    ta 100
    ch 310
    cya 40
    temp 79.7

    I used the pool calc and added 1 gal of clorine and approx 1/2 gal of muratic to get to fc 3 & ph 7.2.

    The t/a level is dropping to a better level after adding acid and areating.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    JasonLion's Avatar
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    Re: new pool water balance, questions

    TA and CH numbers look better than last time, but your FC level is too low. With CYA at 40 you want to keep FC between 3 and 7, and never below 3.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: new pool water balance, questions

    It's up to 5 now that I added clorine. I'm getting better at testing and it will be nice when I remember what to do without looking at the instructions. That speedstir helps alot, I didn't use it the first test.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: new pool water balance, questions

    Latest set of numbers from this morning, had'nt checked in 4 day's, that may be too long, fc was really low.

    fc 4.5

    cc 0

    tc 4.5

    ph 7.5

    ta 100

    ch 350

    cya 42

    temp 81.5

    salt 3200

    For some reason the salt cell is saying low salt and the clorine level this morning was only .5 ppm. not sure whats up there, but I added what chlorine was required to get to a good level.

    I was also surprised that my cartrige filter really needed to be cleaned after only 2 months, the waterfalls flow was diminishing but the "gauge" on the filter did'nt indicate it was time to clean. It needed it, and after everything weas flowing normally.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad Bama Rambler's Avatar
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    Re: new pool water balance, questions

    Four days is too long to go without testing. You should test every day until you get very familiar with your pool and even then you should test at least every other day.

    Have you cleaned the cell. With your numbers you may have to clean it more often. Also your CYA is low. How'd you get a 42 on that test?

    I'd turn the swcg off and run the OCLT to be sure there's nothing growing in there that's consuming your FC.
    Dave J. TFP Moderator
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    Re: new pool water balance, questions

    Since the cc are at 0 does'nt that mean that nothing is growing? Water is crystal clear. I'll check the oclt procedure and do that tonight.

    I hav'nt cleaned the swcg yet but I will look into that also, I read the manual last night and I'll try hosing it out 1st. then acid if that fails.

    The water level was slightly below the 40 mark on the cya tube so I "guestimated" it was 42. I've been wary of adding more but have read that most swg systems should have 50 / 70 so I guess I'll add a little.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad Bama Rambler's Avatar
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    Re: new pool water balance, questions

    You can have zero CC's and still have organics growing in the pool. That's why there are 3 steps to passing the OCLT.
    Dave J. TFP Moderator
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    Re: new pool water balance, questions

    At 8pm the cl level was at 7.5 ppm, after alot of kids swimming yesterday and this morning's disscussion I added a little too much clorine. I disabled the swcg system at 5pm today. Lets see what happens by am.

    I bought some more cya powder today and will add some in a sock after my test tomorrow. I wanted to get liquid but the pool supply only had dry cya, they had "water conditioner" that sounded simalar but the ingredients wer'nt cya but something else, cant remember now.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad Bama Rambler's Avatar
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    Re: new pool water balance, questions

    That's a good plan.

    The granules are good to use. There's usually no use in using the liquid. You're not in that big a hurry to raise it anyway. If it doesn't have nearly 100% Cyanuric Acid you don't want it.
    Dave J. TFP Moderator
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    Re: new pool water balance, questions

    Thanks for the help Bama.
    Oclt test looks good, as of 7am the cl was at 7ppm with 0 cc, water looks great.
    Added 28oz cya in a sock, pool calc said 60oz but I figured I'd sneak up on it by just adding half and see where it is. I guess it will take up to a week for the new cya to register on the test?
    I also added 20lb of salt to bring that up to 3300 ppm.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: new pool water balance, questions

    The swcg is back to reading "good" salt level now, I am going to clean it soon.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: new pool water balance, questions

    Remember to squish the CYA sock frequently. That will help it dissolve.
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
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    Re: new pool water balance, questions

    Got it, thanks.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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