Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 32

Thread: Am I reading test results right?

  1. Back To Top    #1

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Exclamation Am I reading test results right?

    Hi, I have had a green mess with my pool for about 3 weeks now, and finally ordered a good test kit, which arrived today. I just had time to test a couple things before I had to leave, I think my major problem is my CYA is over 100 so I will have to half drain and refill my pool tomorrow, did not want to do this since I will be closing in 3 wks anyway, but cant close it like this anyway. The dap-fsd I filled to 25 mark and it took 60 drops to turn it to clear, so does that mean my TC is 120 ppm, then it took 3 drops to turn it back to pink, so I have zero FC? I am just wondering if I am reading this right. Will have to read up on this tonight, but am just trying to get a plan besides the half drain right now. PH 7.8, but not worrying about that right now, total alk 140. I dumped a bottle of Floc in it today earlier in disgust, and it actually looked like it was smoking like the witches brew it has become. I have been in it everyday vacuuming to waste, and my skin is still intact.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,998

    Re: Am I reading test results right?

    Welcome to TFP!

    Here are some more detailed test instructions structions. Use a 10ml sample for the FAS/DPD test and multiply the drops times 0.5. With a 25 ml sample you multiply drops by 0.2 to get FC.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Yes i realized that after i was up to about drop 49 i will do the smaller one next time.

  4. Back To Top    #4
    JesseSchmidt's Avatar
    Join Date
    Jun 2015
    Location
    Fairfield Twp, OH
    Posts
    206

    Re: Am I reading test results right?

    When using the 10mL sample size, you divide the number of drops by 2(or multiply by 0.5). If you use the 25mL sample, you divide drops by 5(or multiply by 0.2). Using the 10mL sample is perfectly fine and saves your reagents since you'll use less drops!

    All you need to get this green monster in check is a lot of bleach and some patience!

    Do the diluted CYA test to get an idea of what your CYA really is. Any CYA reading of 90+ is suspect to be higher since the test tops out at 100. Fill the CYA bottle to the bottom of the label with pool water, then to the top of the label with tap water. Shake it up and pour off the water until it is back at the bottom of the label. Then add the R-0013 reagent to the top of the label. Do the test and multiply your result by 2. For example if you get a 60, your CYA is really 120.
    26k Gal IG vinyl, Hayward Super 1HP, Hayward Pro Series S244T Sand Filter, TFTestkits TF-100 w/ Speedstir
    Links: TFPC for Beginners / ABCs of Pool Water Chemistry / GETTING STARTED / PoolMath / SLAM / TFTestkits / Chlorine/CYA Chart

  5. Back To Top    #5

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Okay, Thank you. I did that just now and it is 60, so it is 120. Unfortunately I added stabilizer 2 weeks ago because of my HTH test strips, plus started dosing it with Trichlor, I forgot that had stabilizer in it. I will start my drain shortly today. I was wanting to know if the CH test I did was 12 ppm or 120 ppm. And my FC was 6? I was wondering if I was reading the test right?
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  6. Back To Top    #6
    JesseSchmidt's Avatar
    Join Date
    Jun 2015
    Location
    Fairfield Twp, OH
    Posts
    206

    Re: Am I reading test results right?

    So with the FAS-DPD test, you used 60 drops in the 25mL sample to go clear, right? If so, 60 drops x 0.2ppm per drop = 12ppm FC. Did you then add the 5 drops of R-0003 and the water turned slightly pink again which took 3 drops of R-0871 to go clear again? That means 3 drops x 0.2ppm per drop = 0.6ppm CC.

    - - - Updated - - -

    Also, with a CYA of 120, you should be targeting 15ppm FC with the minimum of 9ppm FC. Until you get the water replaced, just make sure you keep it sanitary!
    26k Gal IG vinyl, Hayward Super 1HP, Hayward Pro Series S244T Sand Filter, TFTestkits TF-100 w/ Speedstir
    Links: TFPC for Beginners / ABCs of Pool Water Chemistry / GETTING STARTED / PoolMath / SLAM / TFTestkits / Chlorine/CYA Chart

  7. Back To Top    #7

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Yes, thats what I did so I guess its right then? I just am confused where the decimal goes, is 0.6, the same as 6 or is that 6.0 and I thought I had 120 ppm, but you say it is 12?
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,998

    Re: Am I reading test results right?

    I meant to add a link the the detailed test instructions here, Pool School - Extended Test Kit Directions

    There are also videos of the tests here, TFTestkits.net
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  9. Back To Top    #9

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Thank you. I will keep exploring the site. I started refilling about 6:30 and it has been pouring rain since about 6:45, so I will be able to start over tomorrow. I will test my water and see what happens.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  10. Back To Top    #10

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    How much bleach to shock

    Hi, I am thinking I need to shock my pool, yesterday re added half the water since my CYA was 120 and had algae mess, so now my levels are
    CYA 60
    CH 250
    FC 10 and CC 0.5
    TA 150
    PH7.4
    My pool is still cloudy, I have put nothing in it but muriatic acid since refilling, and it has algae, it is a bit cloudier now because I vacuumed up the algae and even with DE in the NEW sand filter it was blowing back out in the water, so I added more DE. Using the pool calculator and putting in my values, it is not telling me to shock it, though I think I need to, but don't know how much bleach to add to get it to the shock I need. I am reading through the site, but I want to get it clean before I have to close it in 3 weeks and I feel if I don't get moving its going to be pea green again.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  11. Back To Top    #11

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Moderator note - both threads merged together

    I started a new thread on this because didn't know if I should or not since its kind of a different question but here is what it said.
    Hi, I am thinking I need to shock my pool, yesterday re added half the water since my CYA was 120 and had algae mess, so now my levels are
    CYA 60
    CH 250
    FC 10 and CC 0.5
    TA 150
    PH7.4
    My pool is still cloudy, I have put nothing in it but muriatic acid since refilling, and it has algae, it is a bit cloudier now because I vacuumed up the algae and even with DE in the NEW sand filter it was blowing back out in the water, so I added more DE. Using the pool calculator and putting in my values, it is not telling me to shock it, though I think I need to, but don't know how much bleach to add to get it to the shock I need. I am reading through the site, but I want to get it clean before I have to close it in 3 weeks and I feel if I don't get moving its going to be pea green again.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  12. Back To Top    #12
    VinDeeLoo's Avatar
    Join Date
    Jun 2016
    Location
    Tonkawa/Oklahoma
    Posts
    204

    Re: How much bleach to shock

    How are you getting your test results? Assuming you are using on of the recommended test kits - Pool School - Test Kits Compared
    According to http://www.troublefreepool.com/calc.html at your CYA (Pool School - Chlorine / CYA Chart) you would need to maintain at 24 ppm for your SLAM. You need 311 oz of 8.25% chlorine.
    VinDeeLoo
    7600 gallons ~ AG ~ Summer Waves Cartridge C Filter ~ using pump that came with our Summer Waves 18 x 48 pool ~ Taylor K-2006 (SpeedStir & Sample Sizer) ~ no well water or water restrictions

  13. Back To Top    #13

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: Am I reading test results right?

    Here is the information for how to kill algae Pool School - SLAM - Shock Level And Maintain

    This is a process and not a one time addition of bleach to "shock" the pool. You'll need to raise your FC to shock level for your CYA and keep it there until you pass all three tests. There isn't a straight answer to how much bleach you'll need to complete the process as this could take a couple of days or even a week or more. It all depends on the pool.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  14. Back To Top    #14

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: How much bleach to shock

    Ok thank you. I have a taylor 2006

    - - - Updated - - -

    Yes, I have read that one, thank you. I think I know it, and then I am reading so much, that I just seem to get confused, after I went back outside, it dawned on me that I saw the chart of CYA and what levels for the chlorine, I guess I need to print them out. Thanks again.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  15. Back To Top    #15

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: Am I reading test results right?

    You'll get it

    Keep reading and when uncertain just ask and you will find no shortage of help here.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  16. Back To Top    #16

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Hello, I did the 311 ounces of chlorine, more like 325 oz. an hour ago, and I tested my water, and get 18.8 on total chlorine and 10 on CC. Am I testing it too soon because its 18.8 instead of 24 or did I lose that much already?

    - - - Updated - - -

    Hi, thank you. I hope so. my memory isn't as good as it used to be.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  17. Back To Top    #17

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: Am I reading test results right?

    Use the pool math link at the top of the web page. Put in your pool volume and put in your current readings and target readings. That is where vindeeloo got the calculation in post #12.

    If your addition didn't get you to target, you might be slightly underestimating your water volume. Usually you'll want to test about 30 minutes after adding chlorine with pump running. Focus on FC now and ignore everything else now that you have elevated chlorine. The PH test isn't even valid with FC above 10. Make sure you are brushing as frequently as possible while keeping and maintaining chlorine at shock level for your CYA.

    I'm speaking from solid experience at killing algae not just textbook/pool school knowledge
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  18. Back To Top    #18

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    OK, thanks, I will check it right quick again, its getting ready to storm again which I'm sure will help it a lot.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

  19. Back To Top    #19

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Am I reading test results right?

    Use the 10ml sample and divide your drop count by 2. It will save on reagents. If you are getting low-ish on anything, order more ASAP.

    I am worried that you are still having problems testing. If you used a 25ml sample of water, your results indicate that you used 94 drops of 0871 for FC and 50 drops for CC. That is likely an error in math. Please tell us your sample size and the number of drops you used.

  20. Back To Top    #20

    Join Date
    Aug 2016
    Location
    kansas city
    Posts
    17

    Re: Am I reading test results right?

    Hi, yes i already ordered more, I used 94 drops of 0871, and only 2 drops of the other to get the CC. I added more and tested again using the 10 sample size and it took 44 drops for FC and 2 again for CC.
    15,000 gal 27' x 52" round above ground vinyl liner sand filter, 1.5 HP pump

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •