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Thread: SWG too high after slamming! Help

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    SWG too high after slamming! Help

    Hello, we've just completed slamming our pool for the last week for an algae bloom. During this process we had had our SWG turned off ( so we could accurately check our OCLT). We left the SWG off during the day time as well while we added liquid chlorine. Now since the chlorine level are drifting down to around 10ppm, I turned on the SWG and its stating our SWG is at 4500 ppm. Yikes! It's never been this high before. Could this be a result of adding liquid chlorine? Or could this be inaccurate? I understand if our levels really are this high, this could damage our vinyl liner. What should we do? Please help, and fast. I dont want to cause any damage.

    ( we have a 37000 gal inground pool, vinyl liner, jandy pool equipment).

    Thanks

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    ComputerGuyInNOLA's Avatar
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    Re: SWG too high after slamming! Help

    Having too much salt is not going to damage your liner. Having too high of a chlorine level will. The problem is your SWCG may not function when it thinks the salt level is that high. Do you have a way to check the salt level such as test strips or the Taylor K1766 Salt test kit? You may want to try and reset the breaker in your Jandy control center that powers the control center and the cell. Check the salt level after you do this. I believe my Aqaupure will only work between 3000 and 3500 ppm of salt. It sometimes wanders a bit but always seems to get back to the correct reading. What was the salt level before you started slamming?
    Gunite/Plaster pool at 13k gallons. All Jandy with CL340 series cartridge filter, 1.5 HP Jandy Stealth pump. Jandy 1400 SWCG and PDA4 controller. Dual waterfalls. Polaris 280. Pool installed August 2012. Southern Louisiana. And lets not forget my trusty TF100 test kit!

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    Re: SWG too high after slamming! Help

    Do you have another way to verify the salt level of the pool other than what the SWG says? The Aquapure will work in a wide range of salt level, not just 3000-3500 level, as that is the recommended range. I believe it will produce chlorine if the salt level is 2000-4000+. If the SWG will not produce chlorine with your current salt level most likely you will need to drain some water off. I would get the salt level verified before I would drain any water though.

    I have noticed that my SWG reads a little higher than normal when I add liquid chlorine, then it settles back down after a day. The output might be averaging the reading for a while and it thought it was high when the boost of liquid chlorine was making it past the sensor.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Re: SWG too high after slamming! Help

    Ok. I also used salt test strips and that also stated salt at 4200ppm.

    Here's a dumb question (forgive me, as I'm still trying to understand how this SWG system works):
    we had our SWG off for 1 week while we were shocking/slamming the pool. When turning it back on, it showed the levels as being elevated (as stated above 4000-4500). If I turn my SWG back on to say like 20%, that will convert to chlorine. Will that help "burn off" some of the salt? (since it's being converted to chlorine?). Or am I best to leave the SWG off, and drain part of the pool?

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    Re: SWG too high after slamming! Help

    You don't burn off the salt. The FC (CL) turns back to NaCl as the CL is "used" to kill organics.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: SWG too high after slamming! Help

    So does that mean, that all the liquid chlorine we put in the pool last week to "slam/shock" the pool is now being converted back to salt?...So then, really I probably need to drain some of the pool, correct?.... Our pool is 20x44 (approx 37000 gals), any quess on how far I should drain down if need be?

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    Re: SWG too high after slamming! Help

    Adding bleach does add a little salt to the pool, but not any significant amount. Go to the bottom of PoolMath and you can determine how much salt it added by plugging in how much bleach you added.

    Bleach is Sodium Hypochlorite (NaClO).
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: SWG too high after slamming! Help

    Great. Thank you.
    Ok, another question:
    So if my Salt level shows to be 4000ppm, and I turn my SWG from 0% to 20%, will it affect my Salt level? (will my salt level go up, or since it's being converted to chlorine, will it go down a little)? (Again I apologize if my questions seem elementary. I'm trying to understand the concept of the SWG and how it all works).
    My understanding is that the only way to get rid of salt in the pool is when water is taken out of the pool via being splashed out or drained out. Is that right?

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    Re: SWG too high after slamming! Help

    It stays the same. Salt stays in the pool until it is backwashed, splashed, or dumped out.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: SWG too high after slamming! Help

    The bigger question is if your swg is still generating chlorine then you're probably ok. My cell was saying my Salt level was 6200 and it was still generating. (It's supposed to stop at 5500). The cell has been replaced, and now it shows a a more respectable 3900.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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    Re: SWG too high after slamming! Help

    If the SWG works with the salt level that is in the pool I would leave it alone for now as your swim season isn't going to be much longer where you live.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Re: SWG too high after slamming! Help

    So at some point you overshot the salt number. What did your SWG say before the slam? Mine is horribly inaccurate but like mentioned. As long as it is in range to run.


    30x20 vinyl IG, Hayward SD60 with Pentair Dynamo 340219 2HP pump, Compupool CPSC24 SWG, Hayward H200FDN heater. APC automatic pool cover.
    Central Illinois

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