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Thread: To SLAM or not to SLAM?

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    To SLAM or not to SLAM?

    I have been worried that i was losing too much FC during the days so I did an overnight test. Last night I had 4.5 & this morning 4.0 with .5 cc. Should I be concerned enough to SLAM?


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Mod Squad jblizzle's Avatar
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    Re: To SLAM or not to SLAM?

    Borderline IMO. I prefer to do the OCLT starting up at least at 10ppm.

    How does the water look? What is your CYA?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: To SLAM or not to SLAM?

    CYA is 35. Water is clear. I'll try OCLT from 10 & see.


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Mod Squad jblizzle's Avatar
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    Re: To SLAM or not to SLAM?

    Raise your CYA up to 50ppm and your FC loss will be less. The sun is starting to get intense.

    I just bumped my CYA up from 40 to 80ppm for my SWG ... with no change to the SWG output, my FC is a good bit higher than it was. In fact, I meant to turn down the output over the weekend.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: To SLAM or not to SLAM?

    Seriously? I thought 30-35 was ideal. I just drained it to get it down again. I'm in AZ Phoenix area


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Mod Squad jblizzle's Avatar
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    Re: To SLAM or not to SLAM?

    I know you are in PHX, I am in Tucson.

    TFP recommendations are 30-50ppm, depending on your level of sun exposure.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: To SLAM or not to SLAM?

    Ok thx. I hadn't read anywhere that u lose less FC with higher cya. Since you're in Tucson, how much FC have u been losing in a day? How about in summer?


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Mod Squad jblizzle's Avatar
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    Re: To SLAM or not to SLAM?

    Don't know, I run a SWG which is constantly adding FC.

    It is fairly typical to have to add 2-4ppm of FC daily.
    It is a little counter-intuitive, since when you raise the CYA level, you need to maintain a higher FC level, but in fact you lose less ppm daily.
    You kind kind of think of the CYA as protecting a % of the FC. The higher the CYA, the higher % of FC protected. The danger with going too high though is that if a problem develops, extremely high FC are required.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    To SLAM or not to SLAM?

    Need some advice after a major screwup. I have stenner auto chlorinator. My power went out & even though the pump says it has batter backup it failed to kick in. So I had to reset my time & timer. I set it to start at 10pm & accidentally set the end time for 1115am & didn't realize it until day 2. The stenner dumped 12 gallons of chlorine into my pool over that period of time. My chlorine ppm is 26. With a cya of 40, what do u recommend? Let it come down by itself? Should I be worried about anything? What's the safe level I can swim?


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Re: To SLAM or not to SLAM?

    Meant to say the stenner dumped 12 gallons in without me realizing it.


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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    Re: To SLAM or not to SLAM?

    FC will come down on it's own due to loss from the sun. 26 ppm is just above shock level for 60 ppm CYA, shouldn't hurt anything. Seems a little high to be swimming until it comes down to at least 16 for your CYA.
    TF-100 kit, SpeedStir, Sample Sizer. Still in early stages of pool planning

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    Re: To SLAM or not to SLAM?

    The sun will burn it off quickly. If your pool gets full sun I bet you're under 20 FC by dusk tonight. Heck - 12 gallons for a pool your size should be upwards of 80 ppm FC. So you've likely already burned off the majority of it.
    John - 16,000 gallon | in ground | pebble | Triton II sand filter | TF100 | speedstir | Hayward Phoenix 2x

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    Re: To SLAM or not to SLAM?

    It's already down to 11ppm. I'm assuming because it me 110 degrees outside & cya is 40 so any ppm above a certain amount will burn extra quick.


    14,000 gallon pool, plaster, Pentair FNS 60 DE, Variable speed pump, Chandler, AZ (Phoenix area)

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