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Thread: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

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    Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Hi All,

    I'm sure there's a post somewhere in here about how the Taylor K-2006 or TF100 testing results are superior to any pool store readings but I wanted to double check since the results were extremely far apart and I was just about to add more Calcium Hardness to get up to the recommened level for SWG (300 ppm) but now, I'm a little bit iffy. Only reading that came out similar were the pH and CYA. Below are the results of the two.

    Taylor K-2006

    Free Chlorine 7.6
    pH 7.7
    Alkalinity 80
    Calcium Hardness 250
    Stabilizer 70
    Salt (K-1766 Test) 3800

    Pinch-A-Penny

    Free Chlorine 3.0
    pH 7.7
    Alkalinity 100
    Calcium Hardness 350
    Stabilizer 70
    Salt (K-1766 Test) 3500

    Note, I've done several tests with my K-2006 because I've been trying to reduce the FC by reducing the output on the SWG or keeping it off completely, dial in the Alkalinity to 70-80 and Hardness to 300 and the results have been the same. So why the big difference?

    Thanks all for your help.
    Size and Type : IGP, 7500 Gallons
    Finish: Wet Edge Satin Matrix Finish (pebble), Cartridge: Unicel Model C-8409, 12 PSi, Pump: 1.5 HP A.O. Smith Model USQ1152 (not sure if it's two speed or variable), Pool Date Remodel: May 2009, Accessories: SWG Auto Pilot Digital Nano Model 75041, Rock Waterfall

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    linen's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    As you suspected, trust your results...however other than the FC, they are closer then I would expect. Was pinch a penny using a fas-dpd test, or just the dpd test?

    One other note, it looks like you are using the 25ml sample for the fas-dpd test...there is not real reason to have that precision (0.2 ppm), the 10 ml sample with 0.5 ppm precision is fine and saves reagents.

    Bottom line, pool store results have been shown time and time again to be very unreliable.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Hi Linen,
    I think they were using just the dpd test. You are correct, I usually use just the 10 ml sample but because there reading was so much higher on the chlorine, I decided to do the 25 ml just to be more accurate. But I've learned to use the 10 ml measurement and also one scoop vs two scoops of the powder.

    So would you say I should add more calcium to get to the 300 level or just hold off?

    Thanks!
    Size and Type : IGP, 7500 Gallons
    Finish: Wet Edge Satin Matrix Finish (pebble), Cartridge: Unicel Model C-8409, 12 PSi, Pump: 1.5 HP A.O. Smith Model USQ1152 (not sure if it's two speed or variable), Pool Date Remodel: May 2009, Accessories: SWG Auto Pilot Digital Nano Model 75041, Rock Waterfall

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    linen's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    You really can't compare dpd results with fas-dpd results unless the FC is really low...definitely trust your test, not only is it more accurate, but you are likely much more consistent with it then pinchapenny.

    As for adding CH, what is the CH of your fill/makeup water? What is your water temperature? How old is your plaster?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Mod Squad jblizzle's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    linen is being thorough with his questions ... if it were my pool, I would say that 250ppm CH is likely good enough for now as it is going to slowly rise as water evaporates and is replaced anyway. Just do not lower the pH below the mid 7s and should be fine ... after all 250 is in the recommended range ...

    ETA:
    Advanced information below .... not for the faint of heart

    I refilled my pool and my CH was around 120ppm ... knowing the rate of evap and CH rise in AZ, I left it and maintained higher pH. Now 10 months later it is around 260ppm. So if I would have raised it to 350, by now I would be approaching 500ppm.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Richard320's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    It took some hunting, but this is one of my favorite posts on this topic: http://www.troublefreepool.com/threads/59474-Inconsistency-in-readings

    Note how the CYA goes up and down historically!
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Patrick_B's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Glad you got a good kit Nick. Over and over we see this, and it's why we encourage everyone to do their own testing.

    TFP Moderator
    Essential Links:
    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: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Thanks for your help! The temperature of my water is 80 degrees. My plaster was done in 2009. I think I was just trying to get to the 300 since that seemed like the "ideal amount" in the SWG article but I will just leave it for now.
    Size and Type : IGP, 7500 Gallons
    Finish: Wet Edge Satin Matrix Finish (pebble), Cartridge: Unicel Model C-8409, 12 PSi, Pump: 1.5 HP A.O. Smith Model USQ1152 (not sure if it's two speed or variable), Pool Date Remodel: May 2009, Accessories: SWG Auto Pilot Digital Nano Model 75041, Rock Waterfall

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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Thank you Patrick! Absolutely!! Since I'm a newbie and until two weeks ago, was having my pool professionally serviced, I spent A LOT of time reading all these great forums and absorbing as much information as possible and the first item of importance that was mentioned was to get a realiable test kit. I'll admit, I was wicked intimadated at first by the whole drop base proceduce but after praticing a few times and watching the videos, it's not difficult and is quite enjoyable. Actually, the CYA test is still somewhat tricky for me but I'll get the hang of it.

    Richard, I enjoyed your post ALOT!! Funny, after my first chlorine test using the K-2006 and not knowing I could really use a 10ml sample, I wasn't enjoying life after 30+ drops and said to myself, there's gotta be an easier way than stirring after each drop. Then I read a post about the Speed Stir and that's when it became FUN! Only thing I was bummed about was using it for the Salt Test. Took awhile to scrub the scratches it made on the tube, so I don't use it for that test but it is great!
    Size and Type : IGP, 7500 Gallons
    Finish: Wet Edge Satin Matrix Finish (pebble), Cartridge: Unicel Model C-8409, 12 PSi, Pump: 1.5 HP A.O. Smith Model USQ1152 (not sure if it's two speed or variable), Pool Date Remodel: May 2009, Accessories: SWG Auto Pilot Digital Nano Model 75041, Rock Waterfall

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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Patrick, this website and all the information the TFP Team provides is AWESOME!!!! Not to mention The Pool Calculator! I spent $10 on an iPhone app that doesn't even compare to that program. I will reiterate, I knew NOTHING about maintaining pools and everything I've learned came from reading on this site! This whole experience with tests and chemistry has become a lot of fun and I'm enjoying it. Wife might be a little mad because I'm spending so much time studying up on this pool stuff, but she's happy we're saving the monthly charge for a service guy so it's still a win win
    Size and Type : IGP, 7500 Gallons
    Finish: Wet Edge Satin Matrix Finish (pebble), Cartridge: Unicel Model C-8409, 12 PSi, Pump: 1.5 HP A.O. Smith Model USQ1152 (not sure if it's two speed or variable), Pool Date Remodel: May 2009, Accessories: SWG Auto Pilot Digital Nano Model 75041, Rock Waterfall

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    Mod Squad jblizzle's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    It is called PoolMath now
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Patrick_B's Avatar
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    Re: Pinch-A-Penny Water Testing Results WAY OFF vs Taylor K-2006

    Quote Originally Posted by Nick's Pool View Post
    Patrick, this website and all the information the TFP Team provides is AWESOME!!!! Not to mention The Pool Calculator! I spent $10 on an iPhone app that doesn't even compare to that program. I will reiterate, I knew NOTHING about maintaining pools and everything I've learned came from reading on this site! This whole experience with tests and chemistry has become a lot of fun and I'm enjoying it. Wife might be a little mad because I'm spending so much time studying up on this pool stuff, but she's happy we're saving the monthly charge for a service guy so it's still a win win
    Thanks for the kind words about the forum, and so glad you are learning from it! Posts like yours are a lot of the reason we hang out here. We really enjoy helping people take control of their own pools. You'll see by the end of summer or sooner, that this stuff is a breeze. It really isn't hard at all once you get the feel of it. Be ready for people being in disbelief when you tell them that mostly what you do is add acid and bleach.

    As for the Apps, I never even looked for one because I use the now, Pool Math on my phone or whatever PC I'm on.
    TFP Moderator
    Essential Links:
    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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