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Thread: First Sample Advice - Conversion to TFP Method

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    Join Date
    Jul 2015
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    First Sample Advice - Conversion to TFP Method

    So, I got tired of fighting algae in my pool, so I did some research and found this forum. I loved the idea of using cheap generic chemicals (rather than expensive proprietary mixes of chemicals) that will allow me to adjust one single parameter at a time. I figured I couldn't do any worse than the pool store, so I bought the K-2006 kit. (I'd quit doing my own testing because I always had trouble with the color matching tests.) Here are the results from my first sample:

    FC: 0.2ppm
    CC: 2+ppm
    pH: 6.8
    TA: 30ppm
    CH: 800ppm
    CYA: 200ppm

    Obviously I need a SLAM. And either I really messed up the CYA test, or two years of 3" pucks have really put me in a tough position. I know the CYA is way too high, which will result in a really high chlorine demand, right? So my thought was to try to get the CYA down to a more reasonable level before I do a SLAM so I don't need a truckload of bleach. I have started to do some water exchanges, but since it's summer in Phoenix I can only do about 5-6 inches per day (which is about 10% of my pool volume). It looks like I would need to do this about 13 times in order to get my CYA from 200 down to 50ppm, so I'll check it again in about a week to gauge my progress.

    So, am I on the right track? Or should I be making other adjustments first? Or in parallel with the water replacement? I just figured there wasn't much point in putting chemicals into water that I'm going to be dumping out tomorrow.
    Joe
    13,500 gal, IG Pebble/Plaster, Hayward EcoStar VS pump, Hayward SwimClear 425 sqft cartridge filter, Taylor K-2006 Test Kit

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    Re: First Sample Advice - Conversion to TFP Method

    First bit of advice is to stop using the 25ml sample when checking FC and use the 10ml sample. It saves on reagents...

    - - - Updated - - -

    Have you read POOL SCHOOL yet? If not, do, and get the recommended levels. Then, go here http://www.troublefreepool.com/calc.html and enter your data. I have no experience with plaster pools. Your CYA is way too high. Just keep at it, lowering a bit at a time and you will get there. I maintained a high CYA pool at 12-14ppm FC one summer. It will also take a truckload of bleach to SLAM that pool. Not fun, but no algae either...
    21,100 IG Vinyl
    Hayward Pump
    Sand Filter
    TFPC
    Taylor K-2006 Kit

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    Re: First Sample Advice - Conversion to TFP Method

    Reduction of CYA will be needed before you can effectively fight algae.

    You might want to look at this ongoing thread by another AZ pool owner who decided to do a partial drain
    Got Some Chemistry Issues
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

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    duraleigh's Avatar
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    Re: First Sample Advice - Conversion to TFP Method

    Welcome to the forum.

    You are absolutely on the right track. Keep doing your partial drains and you will accomplish your goal of 50 PPM and be ready for a SLAM. We'll help.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: First Sample Advice - Conversion to TFP Method

    Great! Thanks for the feedback. I have read through Pool School, and I have some water chemistry background already, but I'm new to pool care. So I just wanted to make sure I was going about this in the right order, and I wasn't overlooking something I just haven't learned yet. I'll keep pounding away at it.
    Joe
    13,500 gal, IG Pebble/Plaster, Hayward EcoStar VS pump, Hayward SwimClear 425 sqft cartridge filter, Taylor K-2006 Test Kit

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    Patrick_B's Avatar
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    Re: First Sample Advice - Conversion to TFP Method

    Welcome Joe!

    Sounds like this will come easy for you, and with some water background it ought to be even easier. Enjoy the forum.
    TFP Moderator
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    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    Re: First Sample Advice - Conversion to TFP Method

    Great. Just do what POOL SCHOOL says to do. You have to be ready to go at it all or nothing. There is no magic involved, just follow what it says and use the POOL CALCULATOR....http://www.troublefreepool.com/calc.html
    21,100 IG Vinyl
    Hayward Pump
    Sand Filter
    TFPC
    Taylor K-2006 Kit

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    Re: First Sample Advice - Conversion to TFP Method

    So, I finally got my CYA down in the 30-40ppm range, so I started my SLAM. (It's hard to tell what my CYA really is given how cloudy/green my water was from the algae. I'll test and adjust the CYA once my SLAM is done.) I started my SLAM four days ago, and have put in a total of 23 gallons of 10% bleach. At the beginning I was burning through about 10ppm of chlorine per hour, and today I am down to less than 0.5ppm per hour of consumption. After reading other threads on here I decided it was time to look for hideouts of algae, so I made sure I had flow through all of the lines (including the vacuum port that I don't normally use), and I removed the pool light. I read that the pool light is a good place for algae to hide, but I didn't expect it to be this bad given how clear the rest of the pool looks! Look at the pics below.

    Now that I've done all of this, I'm hoping that when I do my OCLT tonight I will pass. Then I can move on to balancing everything else more carefully. Thanks to everyone for providing this GREAT resource. You have no idea how satisfying it is watch your pool go from nasty green to crystal clear in just three days. And to have the data to backup that it is truly CLEAN. Thanks again.

    DSCF5473.jpg
    DSCF5475.jpg
    Joe
    13,500 gal, IG Pebble/Plaster, Hayward EcoStar VS pump, Hayward SwimClear 425 sqft cartridge filter, Taylor K-2006 Test Kit

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