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Thread: Need Salt?

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    Need Salt?

    I was running my intex saltwater system and it says I needed to add salt. Problem is it is a 16x48 Intex metal frame pool, and I already added 5 bags of salt. I cleaned the saltwater system with vinegar and it says salt level is good than 2 days later I get the low salt error. Been going on for about a week now. I am using city water.

    Intex test strip that came with the system

    Free Chlorine - tan color that is not on the chart
    pH - 8.5
    Alkalinity - ~200

    not sure if the strips are correct, did two strips and same results
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

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    JasonLion's Avatar
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    Re: Need Salt?

    I suspect you are getting calcium scaling in the SWG, though it is impossible to be sure without either a visual inspection of the cell or a complete set of water test results.

    You should never allow the PH to get that high. Keep the PH below 8.0 at all times, and preferably below 7.8. Lowering TA will make that easier. High PH tends to cause calcium scaling, which can cause the SWG to give the error message you mention.

    I recommend lowering PH to 7.2 right away, getting a complete set of water test results, and cleaning the cell again.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Re: Need Salt?

    Whats the best way to lower the PH?
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

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    JasonLion's Avatar
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    Re: Need Salt?

    Muriatic acid, sold by most hardware stores, is the most cost effective, though it is a little annoying to handle (fumes). The other alternative is dry acid, sold as PH Down and similar names by pool stores. Dry acid costs more, but no handling issues. But muriatic acid is best.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5

    Re: Need Salt?

    If I use Muriatic acid do I need to keep the kids out of the pool for 24 hrs?
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  6. Back To Top    #6
    JasonLion's Avatar
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    Re: Need Salt?

    No, muriatic acid only needs 30 minutes with the pump running to throughly mix in. For dry acid I would give it an hour to mix in.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. Back To Top    #7

    Re: Need Salt?

    Is there a chart on how much i need to add?
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  8. Back To Top    #8
    JasonLion's Avatar
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    Re: Need Salt?

    You can use the Pool Calculator to figure out amounts. Remember that when making very large PH changes it is best to use about 1/2 to 2/3 the recommended amount, give it time to mix in, test again, and adjust further from there, because calculations are never exact for PH changes.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  9. Back To Top    #9

    Re: Need Salt?

    Got it, going to pick some up today. Is there anything else I should do to the pool? All I have done was get the filter and saltwater system added 5 bags of salt and thats it.
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

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    aa62579's Avatar
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    Re: Need Salt?

    Just a quick note - you must have your TA level plugged into the calculator for it for it to properly calculate the amount of MA needed to reduce your pH. If you use the default value of 100, it won't tell you to add enough.
    ~~ Allison ~~
    Intex 18' x 48" Easy Set Pool, approximately 5455 gallons
    Krystal Clear 1500 GPH Filter Pump Model 56635EG - 635 with Auto Timer
    BBB FOR BEGINNERS ~ THIS IS A MUST READ FOR ANYONE OVERWHELMED!!

  11. Back To Top    #11
    JasonLion's Avatar
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    Re: Need Salt?

    What else you need depends on what your other levels are. If you haven't already added some, the most likely thing for you to need is CYA/stabilizer/conditioner/cyanuric acid (lots of names for the same stuff). Stabilizer is only sold by pool stores and the pool departments of some big box stores.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  12. Back To Top    #12

    Re: Need Salt?

    You mentioned "calcium scaling". I do know when I take it apart to clean it, there is a lot of build up on it. White chalky stuff so I am sure it is. Any ideas on cleaning that up?
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  13. Back To Top    #13
    JasonLion's Avatar
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    Re: Need Salt?

    The white crusty chalky stuff is calcium. You can use a dilute solution of muriatic acid to clean it out, try mixing one part of acid into four or five parts of water and soaking the cell plates in that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  14. Back To Top    #14

    Re: Need Salt?

    "The cell plates" is that the big piece of metal that looks like a copper bar in the tube?
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  15. Back To Top    #15
    JasonLion's Avatar
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    Re: Need Salt?

    No, this is same part Intex tells you to soak in vinegar, a couple of parallel metal plates in the water flow that can be pulled out of the housing.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  16. Back To Top    #16

    Re: Need Salt?

    Calculator suggested 29oz added 18oz
    Tested water again.

    Free Chlorine - still does not register on the chart. (I looks like it is closely matches the 0.2 but is a little browner than the test strip picture)
    pH - 8.5
    Alkalinity - ~200

    Water has a green tint to it now
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  17. Back To Top    #17
    JasonLion's Avatar
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    Re: Need Salt?

    Having a better test kit would be a huge help.

    Did you allow the water to circulate for half an hour with the pump on before testing again? If not, wait the half hour and try again. If you waited, the most likely meaning of the PH still being high is that it was way higher than it said because you had reached the upper limit of the test. If so, you need to add more acid. The risk is that your test strips are bad, and just register high regardless. Intex test strips are not known for reliability.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  18. Back To Top    #18

    Re: Need Salt?

    Should I take some water and get it test at a pool shop? Is so, how much do they usually charge and how long does it take?

    Edit: yes it did circulate for about 30-45 mins
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

  19. Back To Top    #19
    JasonLion's Avatar
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    Re: Need Salt?

    Most pool stores will test your water for free, hoping you will buy something. Usually it only takes a couple of minutes, but it can be longer if they are busy.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  20. Back To Top    #20

    Re: Need Salt?

    Nice, I am on my way to get it tested and will post the results (and get some stabilizer)
    South Texas - Water is always warm!
    16x48 Intex Metal Frame Pool
    Intex Krystal Clear 637R
    Intex Saltwater System CS8110
    (extra pump not using right now Intex 603)

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