Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 15 of 15

Thread: What is a true indication you need to SLAM?

  1. Back To Top    #1

    Join Date
    May 2016
    Location
    Swansea MA
    Posts
    62

    What is a true indication you need to SLAM?

    Been noticing rainy overcast days my CC tends to rise above the normal 0 or .5 level. I guess the point of post today is this.

    Is the rising CC a reason to SLAM or is failing the OCLT a better sign of needing to SLAM?

    Water is crystal clear by the way!! Thanks to the forum for that.

    P.S. Opened crystal clear and have not had to SLAM yet.Working on 4 weeks open.
    24 ft round AG 12,700 gal. vinyl
    Doughboy Sequel II Rotary DE filter
    TF-100 test kit. 1st full season

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: What is a true indication you need to SLAM?

    CC may rise and fall depending on the amount of organics in the water and the amount of UV the pool receives. As CC rises this is a warning. Failing the OCLT is the failure that indicates a SLAM
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3
    gboulton's Avatar
    Join Date
    Apr 2012
    Location
    Nashville, TN
    Posts
    380

    Re: What is a true indication you need to SLAM?

    I take timing into consideration.

    An 0.5 CC (or even 1.0 if I know it's been an extreme day for some reason) reading in the afternoon is cause for attention, but absent any other indications (smell, clarity, etc) usually not something I think indicates a SLAM. It WILL prompt me to perform an OCLT however, and check carefully in the morning.

    On the other hand, ANY CC I find in the morning is an alarm bell for me, and prompts an immediate SLAM, regardless of any other indicators. This is born both of my belief that if the pool's right, anything the chlorine might have needed to battle yesterday should have lost by morning, and my observation that any morning CC tends to go hand in hand with a failed OCLT anyway.
    -Gordon
    Pool School helps me maintain my 13,500G 24' x 48" ASP with Sand Filtration using a TF100 Test Kit and Pool Calculator.
    Remember, the Shock Process should be followed until : 1. CC is less than 0.5 ppm, 2. An OCLT shows a loss of 1.0 ppm or less and, 3. The water is crystal clear.
    --I didn't buy my pool to swim in it. I bought my pool to watch my wife swim in it. :wink:

  4. Back To Top    #4
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: What is a true indication you need to SLAM?

    Failing an OCLT.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  5. Back To Top    #5

    Join Date
    May 2016
    Location
    Swansea MA
    Posts
    62

    Re: What is a true indication you need to SLAM?

    Thanks for the input. Another odd thing happened this AM when I tested for my OCLT. My FC went up and CC went down.

    Last time I tested PH was 7.5 and CYA was 40

    6/8 8:15PM pump had been off since 7PM and had rained
    FC 4
    CC 2

    6/9 6AM turned on pump at 5:30
    FC 7
    CC .5

    Could the diffrence in results be that the pump had been off for a bit on the first test? Oh and I do have a floater with the very end of 3 pucks floating in there. Once they are gone I will reserve pucks for times I am not around.

    Thanks again
    24 ft round AG 12,700 gal. vinyl
    Doughboy Sequel II Rotary DE filter
    TF-100 test kit. 1st full season

  6. Back To Top    #6

    TFP Guide

    Jezza's Avatar
    Join Date
    Jan 2015
    Location
    Bunbury, WA, Australia
    Posts
    843

    Re: What is a true indication you need to SLAM?

    You need to run the pump before testing to get a reliable result.

    When you perform the OCLT you must take the floater out. You are trying to gauge the FC loss in the absence of further additions of chlorine.
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,
    K-2006

  7. Back To Top    #7

    Join Date
    May 2016
    Location
    Swansea MA
    Posts
    62

    Re: What is a true indication you need to SLAM?

    Wow that makes sense! Can be such a dummy sometime.
    24 ft round AG 12,700 gal. vinyl
    Doughboy Sequel II Rotary DE filter
    TF-100 test kit. 1st full season

  8. Back To Top    #8

    TFP Guide

    Jezza's Avatar
    Join Date
    Jan 2015
    Location
    Bunbury, WA, Australia
    Posts
    843

    Re: What is a true indication you need to SLAM?

    Nah we have all had our moments. There is a lot of info when your trying to piece ot all together.
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,
    K-2006

  9. Back To Top    #9

    Join Date
    May 2016
    Location
    Swansea MA
    Posts
    62

    Re: What is a true indication you need to SLAM?

    Ok removed the floater. Going to do an OCLT should the filter run all night?
    24 ft round AG 12,700 gal. vinyl
    Doughboy Sequel II Rotary DE filter
    TF-100 test kit. 1st full season

  10. Back To Top    #10

    Join Date
    Mar 2015
    Location
    South Texas
    Posts
    411

    Re: What is a true indication you need to SLAM?

    Quote Originally Posted by Bryan C View Post
    Ok removed the floater. Going to do an OCLT should the filter run all night?
    Yes!
    15,000 gallon free form Viking fiberglass pool. Hayward Star-Clear Plus C12002 cartridge filter. Hayward Swim Pure Plus T-15 SWG. Testing with TF-100 Kit. 2 speed 1.5HP Supreme pump. Dolphin Nautilus robotic cleaner

  11. Back To Top    #11
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: What is a true indication you need to SLAM?

    Actually running the filter all night for an OCLT has been debated and I'm not sure it's really necessary. As long as the water is well mixed before you take each sample you should be good to go. Ru Ning the pump certainly can't hurt.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  12. Back To Top    #12
    pinguy's Avatar
    Join Date
    May 2015
    Location
    Pennsylvania
    Posts
    515

    Re: What is a true indication you need to SLAM?

    I've seen my CC go as high as a 6 if it storms and I forget to clean my skimmers out right away. It always goes away once the organic junk is removed.
    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

  13. Back To Top    #13
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: What is a true indication you need to SLAM?

    You see this
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  14. Back To Top    #14
    Swampwoman's Avatar
    Join Date
    Apr 2012
    Location
    Grand Rapids, MI
    Posts
    3,535

    Re: What is a true indication you need to SLAM?

    I used to resemble that remark
    In ground extended Grecian, 22,000 gal, Hayward 220t sand filter, vinyl liner, dolphin m4 supreme.
    If TFP has helped you, please click to SUPPORT TFP!
    Helpful Links:
    GET A TEST KIT Chlorine/CYA Chart How to SLAM About Metals & Stains

  15. Back To Top    #15

    Join Date
    May 2016
    Location
    Swansea MA
    Posts
    62

    Re: What is a true indication you need to SLAM?

    That would be a good indication. Lol
    On a better note OCLT passed.
    9:30 PM
    FC 7
    CC .5
    6:00 AM
    FC 7
    CC 0

    - - - Updated - - -

    My first full season with the pool and already have friends asking how do you get the pool so clear. I also find myself cringing when I see people with test strips and dumping pool store shock in by the gallon.
    24 ft round AG 12,700 gal. vinyl
    Doughboy Sequel II Rotary DE filter
    TF-100 test kit. 1st full season

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •