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Thread: So-So Test Results - Any Thoughts for Newbie

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    So-So Test Results - Any Thoughts for Newbie

    I did some testing tonight and wanted to post my results just to see if any of the experts can point me in the right direction. I used the pool calculator with my results and have an idea of what to do but trying to build some confidence based on feedback from the board. My main concern based on the Balancing for SWG article in pool school is the CYA level being so low, calculator says to add 47oz, I have added about 3.14lbs since I set the pool up about a month ago. The second concern is the TA level, it is much higher than the recommended range for SWG. Pool school indicates I need to lower ph to 7.2 and then aerate to get TA down (how do you aerate). Also, my FC number is low, do I need to run my SWG for a longer time (currently running for 3 hours in the morning 7am to 10am). I've added 240lbs of salt thus far.

    Here are my results:

    Salt = 2890

    pH = 7.8

    Cl = 0.5

    TA = 180

    CH = 150

    CYA = 25
    20,000 gal, IG plaster, Hayward DE 3620 (72gpm), Flotec 1.5HP
    TF-100 kit

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    Mod Squad jblizzle's Avatar
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    Re: So-So Test Results - Any Thoughts for Newbie

    What does your SWG think the salt level is? You may need to bump that up.

    Your FC is too low ... it needs to be at least 2ppm for non-SWG pools ... and to be safe you should do that. You should supplement with bleach until the FC stabilizes after getting the CYA up.

    The SWG may be working fine, but with the low CYA, the sun is likely burning most of it up ... although 3 hours seems pretty short (what % setting is it on?)

    Step 1: Get the FC up with bleach
    Step 2: Get the CYA level up to 70ish {the three lbs should have raised it up around 50ppm ... so the 25ppm is odd}
    Step 3: Verify the salt level and dial in the SWG
    Step 4: Work on lowering the TA ... aerating is done by the SWG, but you can help with water features, splashing, aiming the jets up, etc
    Jason, TFP Moderator
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    BoDarville's Avatar
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    Re: So-So Test Results - Any Thoughts for Newbie

    spurs21stx:

    Welcome to TFP

    Most SWG pools operate best with a CYA of between 60 and 80 (click Chlorine / CYA Chart link in my signature below). So I would first focus on increasing the CYA to somewhere in that range. In the interim, you can supplement your FC with liquid bleach until you get your CYA up.

    As for lowering TA, you can being by aiming the return jets up, the idea being to get some of the water to break the surface and make contact with the air. For more ideas, try doing a search on "aeration". I seem to remember reading previous posts on that subject here on TFP.
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    Re: So-So Test Results - Any Thoughts for Newbie

    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: So-So Test Results - Any Thoughts for Newbie

    Thanks for the responses. I will get my FC up with bleach and add some stabilizer to get up CYA, will wait to work on TA once I get those two in line.

    As far as I can tell the Intex SWG does not give any readings on salt level (only a code for low salt and high salt). I used a test strip to measure the salt. I based the run time the recommendations from the manual that came with the SWG for my pool size. Not sure what you mean by %, I just set the hours for it to run...I assume it is working at 100%.
    20,000 gal, IG plaster, Hayward DE 3620 (72gpm), Flotec 1.5HP
    TF-100 kit

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    Richard320's Avatar
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    Re: So-So Test Results - Any Thoughts for Newbie

    Quote Originally Posted by spurs21stx
    Thanks for the responses. I will get my FC up with bleach and add some stabilizer to get up CYA, will wait to work on TA once I get those two in line.
    You learn fast!

    TA is what you mess with once everything else is stable and you're bored.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Mod Squad jblizzle's Avatar
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    Re: So-So Test Results - Any Thoughts for Newbie

    Quote Originally Posted by spurs21stx
    Not sure what you mean by %, I just set the hours for it to run...I assume it is working at 100%.
    I am not familiar with your SWG, so maybe they are more basic and do not have a % setting.

    Sounds like you have a good plan
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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