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Thread: First Official Test Results In!

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    First Official Test Results In!

    I took a sample of water in to Leslie's Pool Supply this evening. Here are the results...

    results4-4-2014.jpg

    A little concerned about the Phosphates and CYA. We just inherited this pool and I haven't done much yet. Any suggestions based on these readings?? No idea where to begin. Store people suggested a bunch of Phos-free and the like for the Phosphates. And to drain some water for the CYA.

    When I mentioned that I'd like to transition to liquid bleach and not tablets, he balked and said, "that's not the best route...". Probably to be expected from the store...

    Thanks in advance
    23k gal IG pebble, 48 sq ft Pentair FNS Plus DE filter (FNSP 48) 96 GPM, 1.5 HP WhisperFlo pump, Kreepy Krauly Legend Robot.
    Pool was built in 2011, in Central Texas (Leander, TX)

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    JasonLion's Avatar
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    Re: First Official Test Results In!

    Don't worry about phosphates. My phosphate level has been several thousand for years without any problems.

    The high CYA level is more of a problem, especially since the common CYA test reads levels higher than 100 as 100. So your actual level might be much higher. Unfortunately, replacing water is usually the only practical way to lower the CYA level. However you do it, you need to get CYA down below 100, and preferably down to around 50 or 60.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    bridgman's Avatar
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    Re: First Official Test Results In!

    Does it make sense to bump up the FC level until the CYA can be brought in range ? PoolMath suggests 8-13 ppm of FC for a CYA level of 100, and as you say the CYA level could be even higher than 100. A couple of 121 oz jugs of bleach seems like cheap insurance... that would raise FC to ~10 ppm...
    Cedar hot tub, 680 US gallons - Snorkel wood-burning heater, canoe paddle, "offline" Intex 1000 GPH pump/filter with skimmer

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    BoDarville's Avatar
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    Re: First Official Test Results In!

    These results are a good baseline to get started with. Going forward, I would suggest investing in one of the Recommended Test Kits and take control of your testing. Your test results will very likely be more accurate than any test done by a 3rd party, plus you will begin to learn more about managing your pool water chemistry. A good test kit is a bargain compared to the cost (expense and time) of dealing with a problem that could have been avoided with proper testing.
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    BoDarville's Avatar
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    Re: First Official Test Results In!

    Quote Originally Posted by bridgman
    Does it make sense to bump up the FC level until the CYA can be brought in range ? PoolMath suggests 8-13 ppm of FC for a CYA level of 100, and as you say the CYA level could be even higher than 100.
    There is a conundrum here. As Jason stated, most CYA tests cannot read levels greater than 100. The other part of the conundrum is that Pool Store test results for CYA tend to be higher than the actual level due to the lighting (see next paragraph). Since we do not know which of these is true yet, I would aim to keep FC at the high end of the target range (13 ppm) for a CYA of 100 until you get a definitive CYA reading below 100. I would make it a top priority to take steps to get the CYA below 100.

    Proper lighting is crucial for the CYA test. This test should be done outdoors in bright sunlight while standing with your back to the sun and holding the view tube at about waist level. The amount of light in a pool store will be considerably less bright than it is outside on a bright sunny day. Less light will result in the dot at the bottom of the CYA view tube to disappear sooner, leading to a higher CYA reading. You can read more about this here: Extended Test Kit Directions. The CYA test is described about half-way down the page.
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    Re: First Official Test Results In!

    Does it make sense to bump up the FC level until the CYA can be brought in range ?
    Sort of, but it is far better to simply bite the bullet and correct the CYA right now and start to balance your pool water within the ranges we suggest.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    bridgman's Avatar
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    Re: First Official Test Results In!

    Agreed... I guess I should clarify that when I ask that question the implied context is "for the next few days or until the weekend when one has time to do stuff like that". I can check levels & adjust daily but even draining/refilling the hot tub usually has to wait for a weekend, which all too often seems to be a whole week away
    Cedar hot tub, 680 US gallons - Snorkel wood-burning heater, canoe paddle, "offline" Intex 1000 GPH pump/filter with skimmer

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    Richard320's Avatar
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    Re: First Official Test Results In!

    Welcome!

    I hate to be the party-pooper, but I wouldn't place too much trust in those readings. If you study this thread you can see how some of the readings bounced over time. The only sure readings are the ones you take yourself on a regular basis so you can spot anomolies.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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