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Thread: In the heat of the summer, what FC do you target?

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    In the heat of the summer, what FC do you target?

    My phone app is targeting a range from 3-7, but when the temp is regurlarly over 100 degrees, and the sun is beating down . . . I wonder if I should make it higher?? It starts to sting my eyes on the higher side though. What is a good level for the high temps, but ok for my eyes and hair??

    CYA 40
    FC is anywhere between 3-7
    PH is 7.8

    I'm not asking how much to add . . . I'm asking what my FC should be? My app is calc'ing enough to get me over 3, I was thinking it should be more?
    Yvette in Burleson, TX
    AG 54" 12x24 partially buried

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    Mod Squad Bama Rambler's Avatar
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    Re: In the heat of the summer, what FC do you target?

    Please post a full set of test results and how you got them?
    Also, how do you chlorinate the pool?

    The proper level is based on the CYA level. Without knowing that we can't say what the level should be.
    Dave J. TFP Moderator
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    AaronGo's Avatar
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    Re: In the heat of the summer, what FC do you target?

    isn't the general goal always to have FC between 3 and 7 ppm irrespective of the season? You certainly want to take into account greater chlorine loss in the summer when it's hotter though.
    18,000 gallon in ground, plaster - completed 6/29/12
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    Re: In the heat of the summer, what FC do you target?

    I will typically target 1 to 2 over the target FC listed on the Chlorine/CYA chart.

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    Re: In the heat of the summer, what FC do you target?

    isn't the general goal always to have FC between 3 and 7 ppm irrespective of the season?
    No, not at all.

    re-read what bama posted....it's dependent on your CYA level.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    AaronGo's Avatar
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    Re: In the heat of the summer, what FC do you target?

    Sorry, I was unclear, I was referring to the OP's case. With a CYA level of 40 the FC target is 5 per the CYA/Chlorine chart. That target level is independent of the season, correct? You always want FC to be 5, year 'round is how I interpret it. So it's not as if you want FC to be 7 in the summer and 4 in the winter, for instance. You will need to add less chlorine in the winter to maintain FC = 5, but that is another issue.
    18,000 gallon in ground, plaster - completed 6/29/12
    Jandy 340 sq ft cartridge filter
    Jandy variable-speed 2 HP pump
    Jandy LXi 400 heater
    Jandy Aqualink PDA-PS4

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    Re: In the heat of the summer, what FC do you target?

    AaronGo,

    that is correct.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: In the heat of the summer, what FC do you target?

    I guess I was asking more in relation to algae growth than I was to the sun eating it up. I think that's why I was confused on why my levels were needed. It seems like if I kept adjusting it to 3 every evening, during the day it would be pretty much gone. The water is very warm, and the sides are also getting hot during the day. I didn't know if I should target 7 it possibly higher when it's over 100 out. I've already had to slam once, I'd rather not have to again.

    Yvette in Burleson, TX
    AG 54" 12x24 partially buried

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    Butterfly's Avatar
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    Re: In the heat of the summer, what FC do you target?

    With 40 CYA, FC should be between 3 and 7, and never below 3.

    I suggest you add enough each evening to reach 7.

    The next evening when you test, it should be around 4 or 5ish. Then bump it back up to 7.
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