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Thread: CH--can it fall that fast?

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    Join Date
    May 2007
    Location
    West Chester, PA
    Posts
    53

    CH--can it fall that fast?

    Here are my test results with my new TF-100:
    FC 5
    CC 0
    TC 5
    pH 7.3
    T/A 120
    CH 150 (we have copper that DH added, so I added the two extra R-0012 drops prior to R0011L and included them)
    CYA 40
    Temp 70

    On 5/25, the last time tested (at Leslie's Pool Supplies using a drop test) the CH was noted at 210. Is it possible for CH to drop that fast?

    Is my FC too low for my CYA?

    The pool has a solar blanket on it now until this weekend when we are ready to use it and the temp is going up to the nineties!!!
    TF-100 Test Kit, 28,000 gallon IG , 3M quartz plaster '09, 48 sq ft DE filter, Heat Siphon SX5HP heat pump '09, Polaris 360 '10, Protect-A-Child safety fence

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    Hi, Maria,

    My intial reaction to your results is that they are nearly perfect!

    How does your water look?

    Do you have a gunite or a vinyl pool?

    Ch is generally stable in pools so I would suspect a testing error on Leslie's part. Over and over, we have all learned that we test more accurately than the pool store.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    May 2007
    Location
    West Chester, PA
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    It's a gunite pool.

    The water was GREEN and sludgy but thanks to all the help here it's clear and bright, ready for summer fun.
    TF-100 Test Kit, 28,000 gallon IG , 3M quartz plaster '09, 48 sq ft DE filter, Heat Siphon SX5HP heat pump '09, Polaris 360 '10, Protect-A-Child safety fence

  4. Back To Top    #4

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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    For a gunite pool, CH is a little low.....200-400 is better.....I'd add a little to bring it up but maybe test it once more to confirm your first test.

    Again, the rest of your numbers are absolutely on the money....Nice work!
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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