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Thread: New Pool Needs A Little Help Getting Numbers In Order

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    New Pool Needs A Little Help Getting Numbers In Order

    I've enjoyed reading all the great information at TFP. My pool was finished 2 months ago and I need a little help getting the numbers in line. To my best calculations I've got around 17K gals in my in ground Pebbletec pool with SWG. I'm just looking to make sure my thinking is in order before I do something that may be way out of line or not needed.

    FC 4.5
    CC 0
    TC 4.5
    pH 8.0
    T/A 70
    CH 150
    CYA 40
    Temp 60 degrees F
    Salt 3200 ppm

    I know the pH is high and I will add acid.

    The CH and CYA are low as well.

    The Pool Calculator is telling me to add 24 pounds of Calcium Chloride to get the CH to 300. That just seems like a lot.

    The pool has a spa so I'm thinking that CH of 150 may be better than 300. Perhaps someone can provide some guidance.

    The CYA is 40 and I'm in an area that gets 350 days of bright sun a year so I should probably maintain it at 70-80. What do you think?

    Thanks,
    Mike
    19K gal SW in ground Pebbletec in the Palm Springs Area
    Hayward 3400VSR (110 gpm) pump
    Hayward SwimClear C4030 (450 sqft) cartridge filter
    Hayward TurboCell T-Cell-15 SWG
    Hayward H400FDN Heater (400K BTU)
    Hayward Goldline ProLogic controller

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    Join Date
    Nov 2010
    Location
    Calera, Al
    Posts
    271

    Re: New Pool Needs A Little Help Getting Numbers In Order

    Your numbers do not look all that bad. You are correct on the CYA and needing additional MA to bring down PH. Not so much on the CH. see this link, it should provide alot of the info you need. pool-school/water_balance_saltwater_generator
    17,000 gal, IG Gunite Diamond Brite plaster Kidneybean,w/7x11 tanning ledge& 3x5 swimout bench,244T 300lb Hayward Pro high rate sand filter(63 GPM) , Hayward 1Hp Super Pump w/3/4 hp booster pump, Polaris 280, Laars Lite 2 175k N/G Heater, Tf-100, Speed stir

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    Re: New Pool Needs A Little Help Getting Numbers In Order

    A few questions...
    Are those numbers from your testing or from a pool store?
    Can you do a test of the tap water, or get a copy of the municipal water info?
    Many parts of California have high calcium levels and if that is the case, you may need advice on that from someone with a higher pay grade than mine to advise you. If you have just filled the pool, then the local water may have CH of 150 or maybe the pool company added some calcium. I have no idea how long it will take for that level to rise due to concentration. Someone here may be able to help on that one. In any case, raising it to 300 may be too much, if your CH will be rising with time. Not sure where is the safe level to begin, but 250 is the bottom of the range. Lower may be safe for a short time, I dunno. But, when you do have to raise it, it will take many pounds, yes. I see on the Pool Calculator that 10 lbs will get you to 210 ppm CH, but you may need to go higher. Let's see what other advice you get on this, someone else will join in in a little while.
    As for the CYA, first check your owners manual but the one SWG manual I've read said 85 for CYA in TX and FLA, I assume that your area may be similar.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    Re: New Pool Needs A Little Help Getting Numbers In Order

    Thanks for the quick responses.

    The readings are what I got with the TF-100 kit.

    Here is what I got about the local water which was updated as of 8/2011.

    Analyte Unit Range Average
    Alkalinity ppm 91 - 130 110
    Calcium ppm 17 - 58 35
    Hardness ppm 54 - 170 110
    pH Units 8.0 - 8.3 8.2
    Potassium ppm 3.3 - 6.0 4.4
    Sodium ppm 22 - 46 31
    19K gal SW in ground Pebbletec in the Palm Springs Area
    Hayward 3400VSR (110 gpm) pump
    Hayward SwimClear C4030 (450 sqft) cartridge filter
    Hayward TurboCell T-Cell-15 SWG
    Hayward H400FDN Heater (400K BTU)
    Hayward Goldline ProLogic controller

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    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,669

    Re: New Pool Needs A Little Help Getting Numbers In Order

    If you decide to bump up the CH I would only bring it up to about 200. I recommend on keeping your pH in the 7.8-8.2 range as much as you can for now. If your pH goes much below 7.8 you get negative on the CSI real quick. Once the water starts to warm up your CSI will improve, closer to 0.

    Plan on raising your CYA to 80 in the next month or two. Don't bring it up at once, a couple of additions will help you not to overshoot it.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Puffin's Avatar
    Join Date
    Jul 2010
    Location
    Metro Atlanta, Georgia
    Posts
    217

    Re: New Pool Needs A Little Help Getting Numbers In Order

    You said your pool was finished 2 months ago. You may want to double check what the CH level should be with the PB since it can effect your warranty. 24 lbs is how much the calculator came up with for me using your numbers. You don't have to bring it all the way to 300 the low end recommendation is 250, (that's only 16 lbs according to the calculator) you can start there and work your way up.

    As for the spa, why do you think 150 would be better?

    With an SWG, you should bring CYA up like you said. Start with 70, add more if you feel you need it. Its easy to add more, not as easy to lower it.
    19,600 gal, Vinyl, Grecian L, StaRite Dura-Glas 1 HP pump, 3/4hp booster, Pentair Clean and Clear 420 Cartridge filter
    The Pool Cleaner 4x, PoolSkim

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