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Thread: Weekly Sunday testing... Questions

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    esim13's Avatar
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    Oct 2009
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    Denham Springs, Louisiana
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    Weekly Sunday testing... Questions

    I have a K-2006 test kit. Here are my numbers...

    FC - 2.5 (just added enough to get back to 7)
    CC - 0
    pH - 7.2
    TA - 40
    CH - 50
    CYA - 50... here's the question, I ran out of solution. I filled tube to the 7 mark and had enough solution to fill halfway between 7 and 14 and it still came out 50. Would the solution be dilluted bc of having more water than solution? Is 50 still a valid reading or would you say it's higher?

    Also, should I raise TA and/or CH. (I have a vinyl liner.) I also struggle keeping pH at the 7.2/7.4 range. It likes to jump to 8 quite often.

    Thanks!
    10,408 gallon, 21' round, 52 in' deep AG, half in ground
    Artesian Clear Master Plus Sand Filter, Artesian Turbo King 2 hp pump, installed June 08
    Denham Springs, Louisiana
    GEAUX TIGERS!
    Pics taken 2012
    http://i941.photobucket.com/albums/ad25 ... CN0606.jpg
    http://i941.photobucket.com/albums/ad25 ... CN0607.jpg

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    Join Date
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    Dumfries & Galloway, Scotland
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    Re: Weekly Sunday testing... Questions

    Quote Originally Posted by esim13
    Also, should I raise TA and/or CH. (I have a vinyl liner.) I also struggle keeping pH at the 7.2/7.4 range. It likes to jump to 8 quite often.
    A Total Alkalinity factor of 80-120 will certainly give you more stable pH results as it acts as a pH buffer when within acceptable readings. Calcium Hardness is not really a major issue, although maintaining it in the region of 200-250 will cease and erosion of plant equipment in a liner pool.

    I am unfamiliar with the CYA test kit's you use over the pond so can't speculate on your reading.

    Stuart
    Stuart Murray
    Scotland UK
    UK NPPOC

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    JasonLion's Avatar
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    Re: Weekly Sunday testing... Questions

    Your CYA reading is not valid. Your actual level could well be higher, but there is no way of telling without getting more reagent and doing the test again.

    You do want to raise TA, but unless you are using trichlor tablets for chlorine, only raise it a little, into the 70 to 90 range. Raising TA too much will result in the PH drifting up.

    There is absolutely no point in adding calcium to a vinyl liner pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    esim13's Avatar
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    Denham Springs, Louisiana
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    Re: Weekly Sunday testing... Questions

    That's what I was thinking Jason. TA of 70 to 90 here I come. I'm also thinking the CYA isn't that much higher (no cause for alarm) bc it was around 30 a few weeks back. I went on vacation for a week and used 3 pucks to help with FC and to bring CYA up a little bit since pool is in full sun. Anyhoo, on my way to ordering more reagent. So, I'll know for sure soon.

    THANKS!
    10,408 gallon, 21' round, 52 in' deep AG, half in ground
    Artesian Clear Master Plus Sand Filter, Artesian Turbo King 2 hp pump, installed June 08
    Denham Springs, Louisiana
    GEAUX TIGERS!
    Pics taken 2012
    http://i941.photobucket.com/albums/ad25 ... CN0606.jpg
    http://i941.photobucket.com/albums/ad25 ... CN0607.jpg

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    Re: Weekly Sunday testing... Questions

    I only test CYA once a month and like you I keep records of CYA additions from tablets or whatever.

    Use the calculated values, that ought to be valid for now.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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