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Thread: I need reassurance

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    Join Date
    May 2016
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    Tucson, AZ
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    I need reassurance

    I have been doing the TFP method for ~18 months with good results.
    I have 15k in ground plaster. My CYA has been ~100 and reducing since beginning TFP. I have been maintaining 10 ppm chlorine and needed to shock twice to 30 ppm in the past year when I neglected to monitor chlorine.
    I use k-2006 to test, but take a sample to my pool store to let them check my CYA. Eveytime they tell me that my chlorine is way too high and unsafe for swimming and unsafe for my equipment, but they insist that 100ppm CYA is appropriate. I hate to think that I understand pool chemistry better than my pool store owner after reading TFP method and forums for a few hours, but their recommendations are contradictory to my understanding of chemical interactions. This past time they even told me that it would be illegal to tell me that my pool was safe.
    Am I missing something?
    Does the chlorine sanitization effectiveness as related to CYA level also relate to corrosive effects on equipment?

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    Mod Squad jblizzle's Avatar
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    Re: I need reassurance

    Welcome to TFP!!!

    Sorry to have to tell you, buy you indeed know more than the pool store owner.

    All too often they seem to only get their chemistry knowledge from the chemical companies looking to sell stuff. And are wrapped up in the outdated EPA water recommendations that pertain to drinking water, not pool water. The FC/CYA relationship was proven in the 1970s and yet the pool industry continues to ignore it ... maybe out of ignorance, maybe out of desire for profit?

    Simple solution is to just avoid the pool store and trust your own test kit (which is likely better than what the pool store uses).

    10ppm of FC in 100ppm or CYA is equivalent in effectiveness and harshness to 3ppm of FC in 30ppm of CYA ... it will not hurt your equipment or you.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  3. Back To Top    #3

    Join Date
    May 2016
    Location
    Tucson, AZ
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    Re: I need reassurance

    Excellent.
    I'm still confused because I only go to the pool store to buy liquid chlorine, but when they test my water they tell me I don't need to buy so much chlorine. So they must not be too interested in profits, just unaware.

    I thought it was funny that I showed them the CYA/chlorine chart and their response was "I've never heard of TFP and wouldn't trust it."

    This site is a great resource, thanks.

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    Donldson's Avatar
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    Jun 2009
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    NW Ohio
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    Re: I need reassurance

    Quote Originally Posted by Marqoid View Post
    This past time they even told me that it would be illegal to tell me that my pool was safe.
    Lol, reminds me of the old mechanic trick, "Legally I can't even let you drive out of here with your car like that." And just the same, 100% lie. There is zero legal regulation of advice given for residential pools, otherwise chlorine-free system salesmen would all be in jail.

    Don't let them test your water. Confirming your testing with a pool store is like using a sundial to verify an atomic clock.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    pinguy's Avatar
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    May 2015
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    Re: I need reassurance

    If you are really interested in the science behind the FC/CYA ratios recommended here, there is a really deep rabbit hole to jump down here: Pool Water Chemistry.
    Helpful Links: Pool Chemistry 101 - Recommended Levels - Recommended Chemicals - FC/CYA Chart - SLAM Instructions - Pool Math
    Test Kits:
    TF-100 - Taylor K2006 - SpeedStir Upgrade - Taylor K-1766 Salt Test
    My Pool:
    28k IG built May 2015 - Autopilot SWG - Pentair VS Pump/DE Filter/Heat Pump

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    Texas Splash's Avatar
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    Re: I need reassurance

    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Piolin's Avatar
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    Re: I need reassurance

    8,400 gal Intex, 3K GPH pump, 16" sand filter, SWG CG-28669, TF100 test kit, speed stir, K-1766 Taylor salt test.

    The corner stone of TFP
    Pool School - Chlorine / CYA Chart

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