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Thread: pH low during slam.

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    Join Date
    Jul 2013
    Location
    Central New Jersey
    Posts
    55

    pH low during slam.

    I know the test is not accurate during high FC levels. However, my FC shortly slipped below 10 and I took the opportunity to test the pH and received a low reading of 6.8. I added some washing Soda to raise it back to a level of 7.2, though I couldn't be completely be accurate with my calculations as a reading of 6.8 can obviously be much lower. Any who the pool is back to shock level FC (around 19 at time of test) and I figured I do another pH test and now received a reading of 7.2. To my knowledge the pH should be reading much higher during with high FC levels. Should I attempted to raise the pH more now or wait until the SLAMing processes is over.

    I've been SLAMing the pool for around 6 days now and the water still has a slight green hue to its other wise milky look. Though admittedly the water was pretty much black when the process was started and I haven't used my filter was much as possible as the water is do contaminated it just raises the pressure in 1/2 an hour or so.
    26K Gallon, IG vinyl
    1.5 HP Hayward Super Pump, DE Filter 36 SqFt
    Older than time TELEDYNE LAARS HEATER (removed from system for now)

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: pH low during slam.

    reading much higher
    Not much higher, just some. I would leave it alone.

    Far more important is to keep that filter running and keep it clean. The more you clean it, the longer in between you can go. Your filter is trying to help you by getting the solids out of your pool water......that's what will get it crystal clear. You have to help the filter by cleaning each time you get a 25% or increase in psi.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Join Date
    Jul 2013
    Location
    Central New Jersey
    Posts
    55

    Re: pH low during slam.

    Quote Originally Posted by duraleigh
    reading much higher
    Not much higher, just some. I would leave it alone.

    Far more important is to keep that filter running and keep it clean. The more you clean it, the longer in between you can go. Your filter is trying to help you by getting the solids out of your pool water......that's what will get it crystal clear. You have to help the filter by cleaning each time you get a 25% or increase in psi.
    Yea its just a pain to do and expensive, going through tons of DE. I might just have to go the floc route as it may well save a lot of money and time compared to relying total on the filter.
    26K Gallon, IG vinyl
    1.5 HP Hayward Super Pump, DE Filter 36 SqFt
    Older than time TELEDYNE LAARS HEATER (removed from system for now)

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