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Thread: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

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    Join Date
    Apr 2016
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    Pinellas Park / Florida
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    5

    2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    I am trying to dial in a correct swg resulting in a good maintenance for this summer. This is the second year I've owned it and I am struggling to stop green algae.

    Located in Tampa Bay, FL., near a very large oak tree (I remove debris daily) and full sunlight. 13,000 gallon marcite pool.

    Testing equipment I have a TF100, Aqua CheK PH, FAC, TA, Stabilizer and a Taylor Salt test kit. Please help dial in maintenance based on today's test below in bold. And thank you in advance for any suggestions!

    Per sgschlorinators.com my SWG Breeze 320 requirements are:

    Salt (4000-4500) PPM

    PH (7.2-7.6) PPM

    Total Alkalinity (TA) (80-100) PPM

    Cyanuric Acid (CYA) (20-50) PPM

    Phosphates Metals (None)

    Calcium Hardness (200-400) PPM

    Free Chlorine (1.0-3.0) PPM

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Today's test prior to 5 gallons of chlorine to try to control start of yet another green algea bloom and prior two days of running pump and SWG 100% total 48 hrs.:


    Salt (4000-4500) PPM ~~~ 4400 OK

    PH (7.2-7.6) PPM ~~~ 7.8...always seems a little high no matter how much Muriatic Acid I add?

    Total Alkalinity (TA) (80-100) PPM ~~~ 95 ppm OK

    Cyanuric Acid (CYA) (20-50) PPM ~~~ (reading 100 ppm from pool store, but 40-50 ppm on my TF100???)

    Phosphates Metals (None) varies between pool store tests 100-300 ppm - how do I test this? and treat?

    Calcium Hardness (200-400) PPM ~~~ 300 ppm

    Free Chlorine (1.0-3.0) PPM Pool store = 0, k1000 = ~~~ .5 ppm - How do I raise this number without carting 20 lbs. jugs of chlorine?

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    pinguy's Avatar
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    May 2015
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    Pennsylvania
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    Re: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    Welcome to TFP!

    First thing first, stop relying on the pool store's advice. Their testing is inaccurate and designed to sell you more chemicals than you need. Getting the TF100 is a great start, and is really the only tool you need to keep your pool crystal clear.

    So lets tackle the algae. Getting rid of algae is not just adding a single dose of chlorine and hoping for the best. You need to SLAM your pool, which entails testing and adding chlorine on a daily basis until the water is clear and you pass the overnight free chlorine test. Check out this article for a great explanation: Pool School - SLAM - Shock Level And Maintain

    For the rest of your questions:
    PH: You lower PH with Muriatic Acid. Use pool math (http://www.troublefreepool.com/calc.html) to calculate the amount.
    CYA: Trust your TF100, not the pool store. 40-50 is a little low for a SWG, but you don't want to bump it up until you complete your SLAM.
    Phosphates: This is irrelevant to keeping a crystal clear pool. The pool store just wants to sell you useless chemicals. You can safely ignore this test result.
    Free Chlorine: Aha! This is why your pool is green. You need to keep this number at around 4-6 ppm with your current CYA level (see chlorine/cya chart below). For slamming, you will need to cart around some jugs. But after things are all clear, the SWG will take over. Do not use powdered chlorine to SLAM. It will add huge amounts of CYA or Calcium, which will lead to further problems down the road.

    Check out these articles as well:
    Pool School - Chlorine / CYA Chart
    Pool School - Recommended Levels
    Pool School - How to Chlorinate Your Pool
    Pool School - Recommended Pool Chemicals
    Helpful Links: Pool Chemistry 101 - Recommended Levels - Recommended Chemicals - FC/CYA Chart - SLAM Instructions - Pool Math
    Test Kits:
    TF-100 - Taylor K2006 - SpeedStir Upgrade - Taylor K-1766 Salt Test
    My Pool:
    28k IG built May 2015 - Autopilot SWG - Pentair VS Pump/DE Filter/Heat Pump

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    Pinellas Park / Florida
    Posts
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    Re: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    Thank you!!!
    My SWG recommends 30-50 ppm on CYA - would I follow the chart to slam for non-SWG i.e.:
    CYA (Stabilizer) Minimum FC Target FC Shock FC
    40
    3
    5
    16
    50
    4
    6
    20

    Quote Originally Posted by pinguy View Post
    Welcome to TFP!

    First thing first, stop relying on the pool store's advice. Their testing is inaccurate and designed to sell you more chemicals than you need. Getting the TF100 is a great start, and is really the only tool you need to keep your pool crystal clear.

    So lets tackle the algae. Getting rid of algae is not just adding a single dose of chlorine and hoping for the best. You need to SLAM your pool, which entails testing and adding chlorine on a daily basis until the water is clear and you pass the overnight free chlorine test. Check out this article for a great explanation: Pool School - SLAM - Shock Level And Maintain

    For the rest of your questions:
    PH: You lower PH with Muriatic Acid. Use pool math (http://www.troublefreepool.com/calc.html) to calculate the amount.
    CYA: Trust your TF100, not the pool store. 40-50 is a little low for a SWG, but you don't want to bump it up until you complete your SLAM.
    Phosphates: This are irrelevant to keeping a crystal clear pool. The pool store just wants to sell you useless chemicals. You can safely ignore this test result.
    Free Chlorine: Aha! This is why your pool is green. You need to keep this number at around 4-6 ppm with your current CYA level (see chlorine/cya chart below). For slamming, you will need to cart around some jugs. But after things are all clear, the SWG will take over. Do not use powdered chlorine to SLAM. It will add huge amounts of CYA or Calcium, which will lead to further problems down the road.

    Check out these articles as well:
    Pool School - Chlorine / CYA Chart
    Pool School - Recommended Levels
    Pool School - How to Chlorinate Your Pool
    Pool School - Recommended Pool Chemicals

  4. Back To Top    #4
    pinguy's Avatar
    Join Date
    May 2015
    Location
    Pennsylvania
    Posts
    515

    Re: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    Quote Originally Posted by onemorekat View Post
    Thank you!!!
    My SWG recommends 30-50 ppm on CYA - would I follow the chart to slam for non-SWG i.e.:
    CYA (Stabilizer) Minimum FC Target FC Shock FC
    40
    3
    5
    16
    50
    4
    6
    20
    Yes, follow the non-SWG numbers.

    We recommend higher CYA levels for SWGs to increase the life the the cell. Sometimes this goes against manufacture or pool store recommendations, but will not do any damage.
    Helpful Links: Pool Chemistry 101 - Recommended Levels - Recommended Chemicals - FC/CYA Chart - SLAM Instructions - Pool Math
    Test Kits:
    TF-100 - Taylor K2006 - SpeedStir Upgrade - Taylor K-1766 Salt Test
    My Pool:
    28k IG built May 2015 - Autopilot SWG - Pentair VS Pump/DE Filter/Heat Pump

  5. Back To Top    #5

    Join Date
    Apr 2016
    Location
    Pinellas Park / Florida
    Posts
    5

    Cool Re: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    Awesome to know! I wasn't sure if higher cya would hurt cell and now I know. Thank you!!!

    Quote Originally Posted by pinguy View Post
    Yes, follow the non-SWG numbers.

    We recommend higher CYA levels for SWGs to increase the life the the cell. Sometimes this goes against manufacture or pool store recommendations, but will not do any damage.

  6. Back To Top    #6
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: 2nd year SWG - trying to dial in maintenance #'s for Tampa Bay

    Looking pretty good! And good info from pinguy!

    Here are TFP's recommendations for your saltwater pool, Pool School - Water Balance for SWGs

    Lowering your TA will help slow your PH rise. I would start at 80 and see how PH acts. If it still rises quickly go to 70, if it still rises go to 60. We definitely recommend CYA at 70-80 for SWG, especially in sunny florida. PH up to 7.8 is fine, just don't let it go higher.
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