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Thread: Odd FC reading

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    astronaut888's Avatar
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    Odd FC reading

    My FC has been staying above 5 and I've been only losing around 2ppm per day so far this season - adding 2ppm nightly.
    Had first big pool party last weekend and everything stayed just fine - crystal clear and no major FC or pH changes
    Well- measured FC last night and it was oddly thru the roof - I stopped adding 003 at 30 drops and cracked my new 003 bottle thinking the reagent had gone bad but got same result
    The day before FC was 7 at night and I added no bleach but did add MA to drop pH to around 7.2 from 7.6
    I checked my alkalinity and it was oddly low at 40 so I added baking soda to shoot for 80

    Gonna check again today - but - what could cause such an odd FC reading when I see no possible way that the FC could truly be that high??

    20k gallons vinyl
    FC ??high?
    CC has never been above zero
    TA 40
    pH 7.2
    CYA 40-50

    Been sunny and in mid 80s
    Water crystal clear
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
    TF-100 test kit

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    Re: Odd FC reading

    Did the same mistake you did, not too long ago.
    You need to add #0871 until the color changes to clear for the FC, then add 5 drops of #003 fo figure out the CC
    12500 AGP 2HP Sand filter
    Five years on BBB & loving it!

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    Patrick_B's Avatar
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    Re: Odd FC reading

    Ooops, a little test error there. R0003 is just the indicator for the presence of CC, not a Titrating liquid.
    Never more than five drops are needed. Simply review the test procedure, and go from there.
    TFP Moderator
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    astronaut888's Avatar
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    Re: Odd FC reading

    OMG - yes - I'm that stupid
    Ha ha ha
    Major mind fart in full effect - I will leave the post just for a laugh

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    Patrick_B's Avatar
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    Re: Odd FC reading

    I can delete it for a small fee....
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    Mod Squad JohnT's Avatar
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    Re: Odd FC reading

    Quote Originally Posted by Patrick_B View Post
    I can delete it for a small fee....
    I can make it look like somebody else posted it for a slightly larger fee!
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    astronaut888's Avatar
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    Re: Odd FC reading

    No way - I gotta own this level of knuckleheadedness

    At least I got my TA headed to a better point

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    Azgirl71's Avatar
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    Re: Odd FC reading

    Sorry about the mistake, but good for you for owning up to it!
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Patrick_B's Avatar
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    Re: Odd FC reading

    You're a great sport. I like that!
    TFP Moderator
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