Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 19 of 19

Thread: Chemicals Gone Wild

  1. Back To Top    #1
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Chemicals Gone Wild

    Help! Pool newbie, just got my TF-100 test kit. I have been using strips until my kit came in the mail. (very inaccurate results.)

    My actual results are:
    FC: 1.5
    CC: 1
    Ph: 7.2
    TA: 190
    CH: 125
    Cya: >100

    I use 3" tabs regularly via inline chlorinator. I have added ph up almost daily. I still can't maintain a decent level.
    Just got over a bout of mustard and green algae last week. (Used yellow treat, shock and liquid chlorine.) Algae is no longer present, but chemical levels are all over the place and I'm clueless.

    I'd appreciate any help you can give me.

    Mahalo!
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  2. Back To Top    #2


    TFP Guide

    domct203's Avatar
    Join Date
    Jun 2015
    Location
    CT
    Posts
    3,375

    Re: Chemicals Gone Wild

    Welcome!

    Congrats on your purchase of a proper test kit, this is your first step to Trouble Free Pool Care.

    I advise you have a read through Pool School, especially the ABC's of Water Chemistry.

    Your FC is way too low for your CYA level, the algae is winning, and with that CYA level you'll need a small loan to purchase the bleach (chlorine) you will need for a proper S.L.A.M. to kill it.

    You will need to lower that CYA level, and unfortunately that requires draining a portion of the water and re-filling with new water.

    STOP using powdered shock and 3" chlorinating tablets. These item are the root cause of your high CYA as that is the binder used to create a "solid" form of chlorine. You should sanitize with only chlorine, aka bleach.

    Be aware of the water table in your area, if it is high you can only drain a small % of the pool at a time so it does not float out of the ground!

    We can help you get your pool back under your control, but you need to follow the advise given.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

  3. Back To Top    #3

    Join Date
    Aug 2013
    Location
    Arab, Alabama
    Posts
    422

    Re: Chemicals Gone Wild

    Welcome to TFP! Dom gives you some great advice...you can get a better idea of your cya by diluting your pool water with tap water. Mix equal amounts of pool water with tap water, test your cya and multiply your results by 2. If your water has a super high cya level you might have to dilute your water 1 to 3. If that is the case add one part pool water to two parts tap water and multiply your result by 3.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  4. Back To Top    #4
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Hi Dom,

    Thank you for your direction. I will read "Pool School" posts as soon as I'm done posting here.
    I'm just clarifying what you have said.

    1) Purchase several gallons od bleach for sanitization?
    2) Remove 3" tabs from inline chlorinator?
    3) Plan on draining a good portion of my pool water? How much? Or would that depend on the test "jaduck" (response below) has suggested?

    I'm na´ve, but I can follow instructions well.
    Thanks again.
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  5. Back To Top    #5
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Hi jaduck,

    Are you suggesting that I retest my cya, but instead of using straight pool water I should use half pool water and half tap water? Then, if its STILL reading too high I should retest using 1/3 pool water and 2/3 parts tap water?

    My initial cya test was not even close to the 100 mark on my tube (maybe half way from the black dot to the 100). I will try your method when I get home.

    Thank you for your response.
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  6. Back To Top    #6

    Join Date
    Aug 2013
    Location
    Arab, Alabama
    Posts
    422

    Re: Chemicals Gone Wild

    1. Yes, 10 to 20 jugs...may need more or less! Can't really have too much.

    2. Yes, yes, yes

    3. We can't advise until we know a correct CYA. Start with a 1 to 1 dilution with tap water. 10 cc of pool water + 10 cc of tap water. Mix this solution well and perform the CYA test. Multiply your results x2. If you CYA is still greater than 100 perform a 1 to 2 dilution. One part pool water to two parts of tap water (10 pw + 10 tw + 10 tw). Test the mixture for CYA and multiply your result x3. Once you get that result use pool math to determine how much water to remove. DON'T remove ANY water until advised on how to perform a water replacement. We do not want you to float that pool!

    Being a guessing man I would say that your CYA is gonna be close to 150. You may start with a 1 to 2 dilution if you desire.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  7. Back To Top    #7
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,949

    Re: Chemicals Gone Wild

    Marci, you are welcome to try the diluted method (for those whose CYA is over 100), but either way you slice that pineapple (ha ha), you can bet your first course of action will be to lower the CYA. No sense doing anything else until the CYA is fixed. So whatever your CYA truly is (i.e 110, 150, 200+), plan on draining about half the pool, refill, then test again until you know your CYA is well below 100 - recommended CYA is 30-50, but at least get it to 70 or below so if you have to SLAM again in the future, it will be manageable.

    After the drain(s) and CYA adjusted to 70 or below, post one new set of numbers so we can keep you on track. Mahalo!
    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!

  8. Back To Top    #8
    Piolin's Avatar
    Join Date
    Sep 2010
    Location
    Miami, FL
    Posts
    604

    Re: Chemicals Gone Wild

    He will answer your questions, but am sure is yes to all of them, also your pH is right where it should be for the slam, good luck
    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

  9. Back To Top    #9

    Join Date
    Aug 2013
    Location
    Arab, Alabama
    Posts
    422

    Re: Chemicals Gone Wild

    Marci - you can also do as Pat has suggested and just start your drain and refill. But if you perform the dilution you will know exactly how much you are going to need to drain.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  10. Back To Top    #10


    TFP Guide

    domct203's Avatar
    Join Date
    Jun 2015
    Location
    CT
    Posts
    3,375

    Re: Chemicals Gone Wild

    Hi Marci,
    How much R-0013(CYA) & R-0871 (FC) reagent do you have?

    I'll agree on jaduck on #'s 1 & 2, but for #3 I would ask what your drain/refill plans are. If you plan to do multiple smaller drain/refills I would save reagents and do the extended CYA test after one or two small drain/refills.

    Even if you overshoot and go lower than 30ppm (doubtful) with the initial small drain, it's easier to add CYA than remove it.

    Now, if you think it's safe to drain 50% or more then by all means do the extended CYA test first.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

  11. Back To Top    #11
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Dom,

    I just got my TF-100 test kit yesterday and I bought an entire refill set.

    Is it recommended that I do small drain and refills rather than one big one? I heard that removing too much water at one time could compromise the integrity of my pools structure. (Vinyl Liner)

    Marci
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  12. Back To Top    #12
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: Chemicals Gone Wild

    Marci, it depends on whether or not you have high ground water. If your water table is not very deep, then it's best to drain in 1/3 or 1/2 increments at a time. With vinyl you need to be extra careful you don't go too low, but try to find out more about your water table depth to be safe.
    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

  13. Back To Top    #13
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Based on the diluted (1 part pool water, 2 parts tap water) my true CYA is 150.

    Looks like I'm about to do a lot of draining and refilling.

  14. Back To Top    #14


    TFP Guide

    domct203's Avatar
    Join Date
    Jun 2015
    Location
    CT
    Posts
    3,375

    Re: Chemicals Gone Wild

    Quote Originally Posted by Marci M View Post
    Is it recommended that I do small drain and refills rather than one big one? I heard that removing too much water at one time could compromise the integrity of my pools structure. (Vinyl Liner)

    Marci
    As Patrick said, this all depends on the water table in your area.

    Quote Originally Posted by domct203 View Post
    ........ Be aware of the water table in your area, if it is high you can only drain a small % of the pool at a time so it does not float out of the ground!
    With CYA at 150ppm, that would mean two 50% drain/refills to get to ~40ppm. If you can safely dig a hole alongside the pool (be aware of utilities, sprinklers, etc), dig down as far as you anticipated to drain. If the hole stays completely dry it is safe to drain to that level. If you start digging and start to see water collecting in that hole, that is as far as you can safely drain.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

  15. Back To Top    #15
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    **UPDATE FOR ALL WHO ARE HELPING ME

    After 2 drain and refills, I seem to be getting on track, not quite there yet.

    I've started a new thread called "Frustrated after drain and refill". This was started when my first drain didn't bring my cya down enough.
    Completed second drain and refill yesterday and my numbers this morning look like this:

    All chlorine levels are at zero.
    pH: 7.5
    CH: 75
    TA: 130
    CYA: 35

    Thanks for helping me tame the beast (CYA)!

    ALOHA
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  16. Back To Top    #16

    Join Date
    May 2014
    Location
    Cookeville,TN
    Posts
    96

    Re: Chemicals Gone Wild

    Hi Marci. I've been practicing the methods taught here for about a season and a half. This is the only place that is not only going to help you beat the algae and help you get a crystal clear pool, but also teach you how you got that out-of-control CYA to begin with and show you how to maintain that cya where you want it from now own. Pool stores and chemical companies don't teach this stuff; they only teach you how to get your pool in a mess over time w/o knowing why it happened. Stick with TFP as long as you own your pool and it'll be trouble free and easy to care for forever. But you can't get this same advice anywhere locally. Usually not even professionals know or practice these methods.
    7600 gallon; 18'X54" round; vinyl; sand filter and 110V pump, 2-speed.
    Near Cookeville, TN--1/2-way between Nashville--Knoxville along I-40; Highland Rim part of the Appalachian Plateau (we call the Cumberland Plateau for the southern half of this geological region).

  17. Back To Top    #17
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Thanks! I've learned so much already. I had never even heard of CYA before stumbling upon this site.
    Discovering that my high cya readings were what was costing me so much time and money was what sold me on this method.

    I still have a lot to learn but everyone here has been awesome and not a single person has called me an idiot yet. LOL
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

  18. Back To Top    #18

    TFP Guide

    pabeader's Avatar
    Join Date
    May 2015
    Location
    Dallas Ga
    Posts
    4,064

    Re: Chemicals Gone Wild

    If anybody does, you send 'em to me. I'll teach 'em a ting or two!!
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

  19. Back To Top    #19
    Marci M's Avatar
    Join Date
    Jul 2015
    Location
    Kapolei, Hawaii
    Posts
    92

    Re: Chemicals Gone Wild

    Ha Ha! Thanks, you're awesome!!
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

Posting Permissions

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