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Thread: Doing the TFP method with a couple of questions

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    Doing the TFP method with a couple of questions

    Did a full drain 2 weeks ago, been testing daily with TF-100 kit. Got the CYA up to 45-50 using liquid conditioner. Today's test results

    FC 1.8
    CC 0
    PH 7.4
    TA 130
    CH 270
    CY 45-50

    Questions are, I was wondering if I should be concerned about my TA level, and also is it normal to have to add liquid chlorine on a daily basis. I have been using liquid chlorine from the pool store with a 10% grade since it is cheaper than bleach, in so doing trying to maintain a 3.0 reading
    Phoenix, AZ USA 12k gal, IG pebble, Pentair TR-100 sand filter, Jandy/Zodiac ePump series-variable speed, builit 1991 (re-plastered with pebble 2013-new pump 2011), Taylor 2006 test kit with (FAS-DPD) chlorine test w/speedstir, Spa attached

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    Re: Doing the TFP method with a couple of questions

    Yes, it is normal to test and dose FC/CC & pH daily. All the other tests can be done weekly except for cya which can probably be tested monthly. What told you 3FC is adequate for your pool? Have you tested the TA of your fill water?
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
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    Mod Squad jblizzle's Avatar
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    Re: Doing the TFP method with a couple of questions

    Your FC is a MUCH greater concern than the TA. According to the FC/CYA Chart, with a CYA of 50ppm, you should NEVER let the FC drop below 4ppm ... so likely should target 7ppm with your daily chlorine addition.

    Looks like you missed the pH test also.
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    Mod Squad tim5055's Avatar
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    Re: Doing the TFP method with a couple of questions

    The first problem I see is that you are targeting FC way too low. FC for a CYA of 50 should NEVER be below 4 with a normal target of 6. Being in Phoenix i would even raise that target to 7 or 8. The goal is to NEVER allow it to go below 4. If you adjust to 8 on a nice sunny Phoenix day you could easily drop 2 - 3 ppm in a day. Bring that FC up before algae can get a foothold in your pool.

    Before I adjusted TA I would watch pH for a while. if it naturally rises like in most pools you will be addign muratic acid to bring it down.. The TA will come down with that.

    How much Pool School have you read? Start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    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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    Re: Doing the TFP method with a couple of questions

    Thanks for the info.........I just now remembered where I got the 3.0 info off the chart as I was adding the solid conditioner initially it was at 15 CYA using the solid conditioner.......so will address the chlorine immediately and raise it to 7ppm and I will test the hose water that was used to fill the pool for a TA test just to know what it is coming out of the hose. As always thank you guys for the info.......I will eventually get the hang of this......fortunately the water is crystal clear.......
    Phoenix, AZ USA 12k gal, IG pebble, Pentair TR-100 sand filter, Jandy/Zodiac ePump series-variable speed, builit 1991 (re-plastered with pebble 2013-new pump 2011), Taylor 2006 test kit with (FAS-DPD) chlorine test w/speedstir, Spa attached

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    Re: Doing the TFP method with a couple of questions

    I just added the 128 oz. of chlorine per the calculator to get up to 7.0 and also tested my hose water for TA and it is 140 coming out of the hose, so it looks like I will be continually battling the high TA count
    Phoenix, AZ USA 12k gal, IG pebble, Pentair TR-100 sand filter, Jandy/Zodiac ePump series-variable speed, builit 1991 (re-plastered with pebble 2013-new pump 2011), Taylor 2006 test kit with (FAS-DPD) chlorine test w/speedstir, Spa attached

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    Re: Doing the TFP method with a couple of questions

    Or not worry about it.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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