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Thread: First test results with a new pool. How am I looking?

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    First test results with a new pool. How am I looking?

    I've been lurking around these forums for quite sometime gathering info but honestly it is like drinking from a firehose sometimes. Anyhow, I got my test ket in and just performed the test. Please interpret the results with the caveat that this is the very first time I've done this and could have very well screwed something up.


    This is a vinyl, lazy-l, ~27k gal, salt water, and about 4 weeks old.

    Please let me know what you think. Thanks for the help.

    Here goes:

    FC 8.5 ppm
    PH 8
    TA 90 ppm
    CH 210 ppm
    CY 45 ppm
    Salt 3400 ppm

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    ship of fools's Avatar
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    Re: First test results with a new pool. How am I looking?

    Quote Originally Posted by HamSammich View Post
    I've been lurking around these forums for quite sometime gathering info but honestly it is like drinking from a firehose sometimes. Anyhow, I got my test ket in and just performed the test. Please interpret the results with the caveat that this is the very first time I've done this and could have very well screwed something up.


    This is a vinyl, lazy-l, ~27k gal, salt water, and about 4 weeks old.

    Please let me know what you think. Thanks for the help.

    Here goes:

    FC 8.5 ppm
    PH 8
    TA 90 ppm
    CH 210 ppm
    CY 45 ppm
    Salt 3400 ppm
    Your pH is a touch high and your CYA is lower than you want it with a SWCG.

    How does the water look??
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

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    Mod Squad woodyp's Avatar
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    Re: First test results with a new pool. How am I looking?

    Drop PH to mid 7 range as your SWG is gonna constantly drive it up. Your CYa level should be between 70 and 80.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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    Richard320's Avatar
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    Re: First test results with a new pool. How am I looking?

    Not too bad. Probably much better than if you had a pool service handle it.

    The pH needs to come down and the CYA needs to come up a little and you could probably turn down the SWG or run the pump a little less because FC is higher than you need, but not to where you will be bleaching out swimsuits. You should check the CC as well.

    When you added CYA, what did you target, and how long ago did you add it? And what does the water look like?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: First test results with a new pool. How am I looking?

    Wow. I didn't expect to see so many responses so quickly. Thank you all very much.

    Quote Originally Posted by ship of fools View Post
    Your pH is a touch high and your CYA is lower than you want it with a SWCG.

    How does the water look??
    The water looks perfect. Crystal clear.

    Quote Originally Posted by Richard320 View Post
    Not too bad. Probably much better than if you had a pool service handle it.

    The pH needs to come down and the CYA needs to come up a little and you could probably turn down the SWG or run the pump a little less because FC is higher than you need, but not to where you will be bleaching out swimsuits. You should check the CC as well.

    When you added CYA, what did you target, and how long ago did you add it? And what does the water look like?
    I have added nothing to the pool myself. The installer set the pool up for us, then came back a few weeks later to make some adjustments. Looking at the suggestions, I think that will change as soon as I make a trip to Lowes/HD.

    The pump comment is very insightful as this has been in the back of my mind. The installer has it set to run 24 hrs in the 1800 rpm range, if I recall correctly. Thanks to TFP, I've learned that this is a waste of energy and I've been meaning to dial the time back a bit.

    For the muriatic acid, does anyone have a feel for how many gallons I might require to get me in the ideal range?

    Thanks again!

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    ozdiver's Avatar
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    Re: First test results with a new pool. How am I looking?

    Just plug your numbers into Pool Calculator
    http://poolcalculator.com/index.html

    For 27k vinyl pool on SWG
    That reading of 8 may be even higher as you are at limit of test.
    But start off assuming it is 8
    Means you need 31oz of MA to bring it down to 7.5.

    Once you add it in front of a return jet, let is circulate for an hour then retest.

    They usually sell MA in a 2x1gal jugs in a box where I am, so get one of those and you will be right for future adjustments. Coat about $11
    40k gal freeform, IG pebblesheen, 9'x'6' raised spa, 2-1/2 hp Whisperflo, 520 sq/ft cartridge, Legend w/ booster, Intellibrite 5g in pool @ spa, Rainbow 320 Chlorinator(retired),
    Mastertemp 400k BTU, 3x3 hp Whisperflo Swimjets, 2x2 hp Whisperflow for 15ton moss rock waterfall, Intelitouch Controller, 850 sq/ft Travertine deck, Gas/Wood firepit,
    Autofill, TF-100 test kit w/ SpeedStir

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    lefty51's Avatar
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    Re: First test results with a new pool. How am I looking?

    Hi Hamsammich (like that handle),

    Well there's not much I could add to what you've been told, BUT in light of a recent post, PLEASE read about adding the MA safely (just being redundant )

    AS Richard320 suggested, adjust the SWG or pump runtime, till you find that sweet spot. What I do is find the shortest pump runtime that will keep the pool "clean" and adjust SWG to maintain high side of FC level. It doesn't matter if SWG runs 100 % for 4 hours or 50% for 8 hours, cell life will be the same. If SWG can't keep up at short runtime then bump up runtime and adjust SWG, etc. etc.

    oh yeah.... Welcome to TFP
    Si -central Mo. 32' x 16' -- 3'4" to 6' deep Vinyl liner - 16,500 Gals : Triton II filter -Duraglass 2 hp pump - 1 speed : SI-30 salt generator
    TF-100 with speedstir

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    Re: First test results with a new pool. How am I looking?

    Great news. Apparently my PH was very high, as many of you suggested. I did a PH demand test and it indicated that I would require almost a gallon of muriatic acid to get in back in line. I added the gallon and retested today. I'm very happy to say that the PH was in the 7.4-7.5 range. I guess I'll go after the CYA next.

    Are there any pitfalls or tricks that I should be aware of as I get my levels in order?

    Thanks again for all of the help.

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    Richard320's Avatar
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    Re: First test results with a new pool. How am I looking?

    Quote Originally Posted by HamSammich View Post
    Great news. Apparently my PH was very high, as many of you suggested. I did a PH demand test and it indicated that I would require almost a gallon of muriatic acid to get in back in line. I added the gallon and retested today. I'm very happy to say that the PH was in the 7.4-7.5 range. I guess I'll go after the CYA next.

    Are there any pitfalls or tricks that I should be aware of as I get my levels in order?

    Thanks again for all of the help.
    Down near the bottom of poolmath in the row labeled "Suggested Goal Levels" you can select your pool surface and chlorine source and whose ideals you want (hint: use TFP) Then it will autofill the suggested ranges.

    Note that when you plug in your goals, that the TA value will affect the pH adjustment. So don't grab a jug of acid until after you've filled out all the Now readings. And when you select a Target, if you're within the range, just enter the now value as the target and move on. No need to micromanage everything.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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