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Thread: CC Question

  1. Back To Top    #1
    Z7What's Avatar
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    CC Question

    Since I started with TFPC I have always had a CC of 0. The last few days the rain has been crazy. Yesterday I added a tiny extra acid because I knew the rain last night and today was going to be a lot.

    Today I checked the levels. I had a pH of 7.4-7.5, FC of 4.5, CC of .5, and adding them together I get a TC of a 5.

    The only thing I did different was added 36% HCl from work instead of store bought 31.45% MA. Could the chlorine in the HCl cause the .5 of CC? Or is something else screwing up?

    Wayne

    - - - Updated - - -

    Also I noticed that Pool Math has changed a while back and never knew why.

    Notice after 12 it says "trade" what does that mean?



    Wayne
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    Defgufman's Avatar
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    Re: CC Question

    The .5 cc is nothing to worry about . Probably rain stuff
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

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    Mod Squad tim5055's Avatar
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    Re: CC Question

    I will quote from Jason about "trade"-

    Quote Originally Posted by JasonLion View Post
    That feature is new this week.

    There are several different standards for measuring the concentration of bleach. Household bleach sold in grocery stores is sold by weight percentage (typically 2% to 8.25%), while liquid chlorine sold by pool stores and cleaning supply stores (typically 10% to 15%) is sold by trade percentage. The two numbers, weight and trade, are fairly close together, but differ just a little because they are based on different historical ways of measuring concentration. I recently updated PoolMath to distinguish between them so it would have better accuracy for higher concentrations of chlorine.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Z7What's Avatar
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    Re: CC Question

    Quote Originally Posted by Defgufman View Post
    The .5 cc is nothing to worry about . Probably rain stuff
    Thanks, im just nervous about it that's all. I don't test CC or TC often and yesterday when I tested it I was shocked to see I had some. I been targeting FC @ 6 and in over 2 weeks it hasn't dropped below 4. What could cause it, or cause a false reading.

    Quote Originally Posted by tim5055 View Post
    I will quote from Jason about "trade"-
    Thanks!

    Wayne
    24'X54" Round 15,000 Gallon Pool
    Pentair SD-60 Sand Filter With 1.5HP Pump & Center Floor Drain
    Lil' Shark Vacuum With Leaf Canister
    New TFPC User And Couldn't Be Happier
    Pool School + Test Kit + Pool Math = A Perfect Trouble Free Pool

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    Patrick_B's Avatar
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    Re: CC Question

    Anything that's gotten into the pool. Body oil, bugs, basically anything organic pretty much. At one drop to clear it, it's pretty much <0.5 on the 10mL test. If you can tell one drop is going to clear it, don't waste the drop if you don't want. If you ran a 25mL test, I bet it would still clear with a drop, so that would technically make it 0.2. So, Virtually Nothing....

    You can keep it this much or less by running your FC at the top of the suggested range if even this amount bugs you, but you really have no worries where you are.
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    Z7What's Avatar
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    Re: CC Question

    24'X54" Round 15,000 Gallon Pool
    Pentair SD-60 Sand Filter With 1.5HP Pump & Center Floor Drain
    Lil' Shark Vacuum With Leaf Canister
    New TFPC User And Couldn't Be Happier
    Pool School + Test Kit + Pool Math = A Perfect Trouble Free Pool

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