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Thread: Salt reads 2300, actual salt is 3000, but cell is good?

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    Salt reads 2300, actual salt is 3000, but cell is good?

    Greetings everyone,

    The pool is 16,000gal, running a Aqua Rite SWG with a -15 cell. The whole install is just a few months past 3 years old (and therefore just out of warranty).

    The LCD on the control panel indicates the salt content of the pool is at 2300. This seems to be below the threshold at which the system believes there is not enough salt in the pool, and stops generating FC.

    A water sample was taken to the local pool shop, and they claim the salt is at 3,000. They put the cell through some test, and handed it back to us claiming the cell is fine.

    So, is there a way to get the cell to read the salt more accurately? Or, even a way to let the system keep generating even though it thinks the salt is too low?


  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Salt reads 2300, actual salt is 3000, but cell is good?

    Welcome to TFP!

    The only things you can do are to either add more salt, or replace the cell. As the cell ages, it tends to read the salt level lower and lower compared to actual. This is usually only obvious near the end of the cell's life, when this process accelerates significantly. You can compensate for this by raising the salt level, but eventually the cell will fail and you will be left with a very high salt level.

    On the other hand, keep in mind that pool store salt tests are unpredictable. They are often just fine, but they are also often wildly wrong.
    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

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    Join Date
    Mar 2007
    Coastalish 'down easter'

    Re: Salt reads 2300, actual salt is 3000, but cell is good?

    Welcome to TFP!!

    I don't disagree with Jason (because he's right).

    The cells can test up to +/- 500 ppm and the salt tests IIRC are +/- 200 ppm. If the cell is good, add salt to keep it happy and generating - the cell won't produce if it 'thinks' the salt is too low! If your test is ~1500 ppm off, then it's time to see if the cell is bad.

    One more thing, have you visually inspected the cell for scale and debris?
    Luv& Luk

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    XsAllOverIt's Avatar
    Join Date
    Dec 2010
    Mount Airy, Maryland

    Re: Salt reads 2300, actual salt is 3000, but cell is good?

    My SWG (Intellichlor) did that right out of the box and it had a calibration method to get it to the correct read level. Is it possible to calibrate the unit to try to get another year out of it?
    18 x 36 Inground Gunnite, White Plaster 21K gallon
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    cws91's Avatar
    Join Date
    Nov 2009
    Baton Rouge, LA

    Re: Salt reads 2300, actual salt is 3000, but cell is good?

    I have the same issue with a 2-year old AquaRite and was also wondering if it could be re-calibrated?
    21,000 gallons
    Pentair 420 Clean & Clear Plus Cartridge Filter - Filter Area: 420 - Design Flow: 150
    Inground Plaster
    Pentair Whisper Flo Pump - 1 HP - Model CCP420
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    Aqua Rite Electronic Chlorine Generator
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