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Thread: Is it ok to test every other day??

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    Is it ok to test every other day??

    I have been testing my fc every other day. On the days I test I always bring my fc back up to 8 ppm. The lowest it has ever gotten was 3.5 ppm. Am I asking for trouble?

    Also if the family were to go away for the weekend would it be ok to bring the pool to shock before we left and not have anyone add any while we were gone?
    18'x48" AG
    Pentair 1 1/2 HP Dynamo Pump
    Sand Dollar Sand Filter w/ Zeobrite
    Lil Shark Vacuum System
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    duraleigh's Avatar
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    Re: Is it ok to test every other day??

    What is your CYA?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Is it ok to test every other day??

    My CYA is at 50.
    18'x48" AG
    Pentair 1 1/2 HP Dynamo Pump
    Sand Dollar Sand Filter w/ Zeobrite
    Lil Shark Vacuum System
    Hard Plumbed

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    Isaac-1's Avatar
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    Re: Is it ok to test every other day??

    It depends on your CYA, however I suggest dosing every day and then when you get a feel for your pool only test every 2 or 3 days as needed, this will reduce the wild swings in chlorine use. With a CYA of 50 and a minimum FC of 3.5 are flirting with potential problems (min suggested FC for your CYA level is 4.0)
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Mod Squad Bama Rambler's Avatar
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    Re: Is it ok to test every other day??

    I would test every day if manually chlorinating the pool. If you have a swcg or injection system you may be able to test every other day. Just be aware of how often your skimmer baskets fills up.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Is it ok to test every other day??

    Given that your FC is mostly higher than the minimum most of the time, you are probably killing off any algae that might start growing when the FC is at its lowest point, but it is risky especially if something unusual happens that increases chlorine demand. If you find your chlorine loss rate to be fairly stable, then you could add chlorine every day but test less frequently.

    You might consider using a pool cover that is at least partly opaque (say, dark blue). I have a mostly opaque pool cover so only test and add chlorine twice a week, but my chlorine loss rate is 1 ppm or less and that's with using the pool every day for an hour or so.

    Another option is to have a higher CYA level and higher FC level combo so that the daily loss is less, especially since you are in Texas with lots of sun. Right now you are losing somewhat more than 2 ppm FC per day; with a higher CYA and FC you will probably lose somewhat less than 2 ppm FC per day. The downside is that the higher CYA level requires higher chlorine levels to shock IF you run into trouble.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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