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Thread: Starting a SLAM tonight...Question?

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    Starting a SLAM tonight...Question?

    First ever SLAM. We have auto cover and typically cover every evening. Do I cover or leave open overnight with FC at SLAM levels?

    FC- .5
    CC-1.5
    PH 7.2
    TA-180
    CH-225
    CYA 30

    Water looks beautiful, but with CC above .5, I figured a SLAM was needed
    Springfield, Missouri 19,400 Gallon IG Vinyl Liner Rectangle Pool (16x36) 4/5.5
    Build in August 2016
    Pentair Heat Pump, Whisperflo 1.5 hp, Coverstar Autocover, 6x16 Tan Ledge with Bubblers, 3 LEDs, Pentair 60 Sand Filter
    TF-100

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    Re: Starting a SLAM tonight...Question?

    Leave the cover open. That cc of 1.5 will dissipate quickly if you let your pool breathe a bit more.

    You will probably be done with that SLAM in just a day or two.

    Carry it out to the finish and then send a pic of your beautiful pool.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Pool Tool's Avatar
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    Re: Starting a SLAM tonight...Question?

    Did you measure the CC over 0.5 immediately after you opened the cover? If so, it may have been falsely high.

    If not, then I would use the cover to help protect the high FC from the UV and keep it closed the majority of the time. Though I would open it for an hour or two at least during the day to help the pool out gas. Good luck.

    Edit - Defer to Dave.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Re: Starting a SLAM tonight...Question?

    Thanks DuraLeigh!!! Ill get a pic up soon

    - - - Updated - - -

    PoolTool I have been testing first thing in the morning when I open my cover. Never realized that they may be false readings... Ill check again before Slaming. Thanks for the heads up
    Springfield, Missouri 19,400 Gallon IG Vinyl Liner Rectangle Pool (16x36) 4/5.5
    Build in August 2016
    Pentair Heat Pump, Whisperflo 1.5 hp, Coverstar Autocover, 6x16 Tan Ledge with Bubblers, 3 LEDs, Pentair 60 Sand Filter
    TF-100

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    Re: Starting a SLAM tonight...Question?

    Pool Tool makes a very good point about what time you test. You might test several hours after you remove the cover and find your cc's are acceptable at .5 ppm or less.

    Generally, an open pool will always help getting rid of cc's.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Starting a SLAM tonight...Question?

    If you plan on continuing to swim periodically this season, closing the pool cover at night will help retain water temperature.

    Pool Tool is absolutely correct that you have to open the pool for a while to let the CC's gas off before testing as the cover will contain CC's. (As a side note, pool covers should be opened every day for at least an hour or two for out-gassing regardless of whether you are slamming or not).

    There has been discussion about the effects of high FC on an auto-cover. I only go into slam FC levels in my closing preparations, so I am not a good judge long-term. My cover is fine when I leave it mostly closed at pre-closing slam levels.

    Hopefully this will be your first and last "slam" besides routine closing slams!

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    Re: Starting a SLAM tonight...Question?

    Curious - lurking post notice FC at .5. Should FC be addressed first?
    19300 gal, AG vinyl, 1 HP Pentair Dynamo two stage pump, 5 yr old Hayward Vari-Flo sand filter, pool 14 yrs old, well water, testing with Taylor K2006

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    Re: Starting a SLAM tonight...Question?

    Quote Originally Posted by kschmidt1 View Post
    Curious - lurking post notice FC at .5. Should FC be addressed first?
    OP is SLAMming (which is in the title of this thread), that will take care of it
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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