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

Thread: Help needed with pool chemistry

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Help needed with pool chemistry

    Hi all, been lurking in this forum for a couple years now. But now need some help. Not sure what to do.
    Pool has been clear until last week and became very cloudy where you couldn't see the bottom. Took water sample to pool store and they said I had no chlorine and salt level was low. Left with pool shock. Water didn't clear up in a few days. Came back to this forum and started looking at Slamming info.
    I've been using a LaMotte 2056 ColorQ Pro 7 Digital Pool Water Test Kit, but don't really know if test are accurate. They never match what the pool store says.
    It does tests for FCL and TCL and my results both showed Hi, (so much for a digitial tester, I guess 9.99 is the highest it goes).
    I've added 12 gallons of pool shock water never cleared up, tests still show Hi.
    So I stopped and order the TFTest kit recommended hear. It arrived today. Here are the results and pool info

    18K fiberglass pool with SWG
    FCL = 13ppm
    CCL = at 100 drops it still never changed back to clear (is this possible)
    ph = 6.8
    Ta = 110
    CYA = 45
    CH = I got 650, don't know if I did this right. The ColorQ tester shows 250

    Also I did start adding some DE to my sand filter 3 days ago and the water is clearing up, I can see the bottom in the deep end now.

    Not sure what to do with the CCL being so high. Do I start the SLAM process up again? What shock level do I need to get at?

    I'd appreciate any help that I can get on this.

    Thanks

  2. Back To Top    #2

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,670

    Re: Help needed with pool chemistry

    Welcome to TFP!

    I'm not sure what you are referring to here, CCL = at 100 drops it still never changed back to clear (is this possible). If you are trying to measure CC, combined chlorine, then it seems you are not doing something right with the test. Tell us what reagents you are using to run this test.

    The pH needs to be increased but it is difficult to say how much with the FC above 10 ppm.

    What chemicals have you put in the pool and what is the color of the water?
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  3. Back To Top    #3

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Re: Help needed with pool chemistry

    I've just added pool shock (12 gallons). Water is still cloudy, getting clearer though. Don't know if the DE added to the sand filter, or just on its own.

    For the chlorine test I did the following
    10 ml of pool water in cylinder
    1 scoop of R-0870 powder and mixed (turned pink)
    R-0871 until clear (26 drops) = 13ppm FC
    add 5 drops of R-0003 (turns pink again)
    add R-0871 and stopped adding at 100 drops

  4. Back To Top    #4
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Help needed with pool chemistry

    If you have read around here much you have probably seen that not much credence is given to pool store testing. But, not many like the LaMotte ColorQ either.

    Good choice on the TF-100. Time to SLAM you r pool.

    You should read the directions on SLAMing your pool in the How To section of Pool School and follow that procedure completely to the end.
    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

  5. Back To Top    #5

    Join Date
    Sep 2009
    Location
    Greentown, IN
    Posts
    914

    Re: Help needed with pool chemistry

    How big is your pool? You might put your pool information in your signature line so we have a better idea what we are working with.

    12 gallons sounds like a lot of shock to be adding at any one time unless you have a very large pool or your CYA is very high.

    How long have you had your test kit? Seems something isn't right.. with the CC part of your test. I certainly wouldn't go with the pool stores tests whatever you do, they are notoriously inaccurate. If you have had the test kit for awhile, it might be worth re-stocking some fresh reagents as they may not be as accurate as they once were.

    DE will help to clear up some of the finer particulates in the water but will wash out when you backwash.

    Salt is not necessary in a pool unless you have a SWG (salt water generator). Some also use it because they like the way it makes the water feel.

    I would check the pool calculator with all of your pool information and keep your pool at SLAM value until you meet all of the criteria for SLAMming. It may take awhile, patience is key!
    Indiana, ABG 24'x52" Galveston by Blue Cascade (Craigslist buy w/part of deck included), 13,500 gallons, Intex SWG, solar panels mix 2, TF-100 test kit.

    Test kits compared
    Purchase test kits

  6. Back To Top    #6

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Re: Help needed with pool chemistry

    18K gallons
    The 12 gallons of shock was over 3 days.
    just got the test kit today.
    I do have a SWG.

  7. Back To Top    #7

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,670

    Re: Help needed with pool chemistry

    Quote Originally Posted by richardmac64 View Post
    I've just added pool shock (12 gallons). Water is still cloudy, getting clearer though. Don't know if the DE added to the sand filter, or just on its own.

    For the chlorine test I did the following
    10 ml of pool water in cylinder
    1 scoop of R-0870 powder and mixed (turned pink)
    R-0871 until clear (26 drops) = 13ppm FC
    add 5 drops of R-0003 (turns pink again)
    add R-0871 and stopped adding at 100 drops
    Seems like you are doing the test correct, and you have an extremely high CC value. I'll let some of the more experienced experts handle this one.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  8. Back To Top    #8

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Re: Help needed with pool chemistry

    Just to make sure I did everything correct I ran the tests again. Here are the results

    FC = 12.5
    CC = 53
    TA = 110
    CYA = 60
    CH = 360

    So from this I need to SLAM and keep shock levels at 24 until CC < .5. (this is a SWG pool)
    How do I figure out how much chlorine to add to get to 24. (18000 gallon fiberglass)

    The gallons of shock I've been buying is 10% sodium hypochlorate.

    Thanks

  9. Back To Top    #9
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Help needed with pool chemistry

    Use Pool Math to figure out how much chlorine to add to get to your SLAM level.
    In your first post your CYA was 45. Now your CYA is 60. Did you add CYA or testing error ? It matters for your FC SLAM level.
    What does your water look like ? Visible algae ? 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  10. Back To Top    #10

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Re: Help needed with pool chemistry

    I didn't add anything, so I'm assuming testing error. These new bottles get bigger drops sometimes it seems.
    No algea, never have seen any, just last week it turned cloudy.

    I didn't know pool math did all this. It is pretty neat. Says I should add 253 ozs of 10% chlorine to get to 24.
    Add then I just keep it there until CC is < .5

  11. Back To Top    #11
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Help needed with pool chemistry

    Pool math is your friend !!
    You need to maintain your SLAM level by testing FC every hour if you can and bring it back up when FC falls below SLAM level. When your FC holds longer you can back of on testing some. Every two hours. Then less as FC holds longer. Make sure you read the SLAM Process and follow it to the T.
    Your done when
    1 water is crystal clear.
    2 you have CC of 0.5-0.
    3 you can pass the OCLT Test.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  12. Back To Top    #12

    Join Date
    May 2014
    Location
    Oro Valley, AZ
    Posts
    120

    Re: Help needed with pool chemistry

    When adding the powder are you using a "heaping scoop"? It should be about the size of two scoops if you leveled off the scoops. It's ok to be slightly over on the amount of powder. I'm curious to see how this turns out and if the CC value of 53 is really valid.
    Thanks,
    Gil

    In-ground: 20,600 gallons; Sand Filter 1HP pump; Kreepy Krauler; Solar Breeze Solar Powered Robotic Skimmer; TFT-100 test kit

  13. Back To Top    #13
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Re: Help needed with pool chemistry

    Quote Originally Posted by Gilrock View Post
    When adding the powder are you using a "heaping scoop"? It should be about the size of two scoops if you leveled off the scoops. It's ok to be slightly over on the amount of powder. I'm curious to see how this turns out and if the CC value of 53 is really valid.
    Me too.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  14. Back To Top    #14

    Join Date
    Sep 2009
    Location
    Greentown, IN
    Posts
    914

    Re: Help needed with pool chemistry

    I've never seen a CC that high either... Interesting for sure.
    Indiana, ABG 24'x52" Galveston by Blue Cascade (Craigslist buy w/part of deck included), 13,500 gallons, Intex SWG, solar panels mix 2, TF-100 test kit.

    Test kits compared
    Purchase test kits

  15. Back To Top    #15
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Help needed with pool chemistry

    I am guessing not enough powder and maybe not doing the test fast enough are providing bad results.
    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!

  16. Back To Top    #16

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Help needed with pool chemistry

    Out of my league. Just yet, I don't think a SLAM is the answer.

    Something changed in your pool to make the water "suddenly cloudy" any idea what that very sharp change may have been?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  17. Back To Top    #17
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Re: Help needed with pool chemistry

    Maybe he should do a OCLT Test to confirm any organics or not.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  18. Back To Top    #18

    Join Date
    Jul 2014
    Location
    Evansville, IN
    Posts
    19

    Re: Help needed with pool chemistry

    just did the test again with a big heaping scoop of powder,
    FC = 13
    CC = 50

    Not sure what happened to make the water cloudy. Talked to a few other people and their pools ended up cloudy as well during the same period.
    I do live in a rural area, but there were no spraying in the fields and I always keep the cover closed. My uncle took a sample to a pool store and they told him is PH was low and calcium, so he did that and his cleared up. Not sure about the other person.

    I'm going to start the SLAM process, but if anybody has any other thoughs/suggestions I'll be glad to try.

  19. Back To Top    #19
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Help needed with pool chemistry

    Before you do anything else, adjust the PH up to at least 7.0. PH levels below 6.8 can read as 6.8, so there is no telling just how low the PH might be.

    You should have an OTO chlorine test, inside the blue K-1000 kit that comes with the TF100. It would be interesting to know what the OTO test does. If the FAS-DPD test is correct, the OTO test should start a brilliant yellow, perhaps with some slight orange tint, and then turn orange, then red, then brown. If it does something else there may be something interfering with the FAS-DPD chlorine test.

    When doing the FAS-DPD test at very high FC and/or CC levels, you need to move through the test fairly quickly, adding drops at something like one drop a second through most of the test. You can slow down when the pink starts getting pale so you don't overshoot, but you need to complete the test fairly quickly. If you take too long you can get false high results.

    From the description, the CC level must be quite high, certainly at least 30, but it is possible it is noticeably below 53.

    You can do the test with just 5 ml of pool water, and each drop will count as 1 ppm. That will allow you to complete the test more quickly and hopefully avoid this issue, as well as saving on reagents.

    CC levels that high with non-zero FC levels are quite unusual. It is certainly possible, but we don't run into a case like this more than once every few years.

    One question, have you been using any non-chlorine shock products? MPS, a common non-chlorine shock, can read as CC on the test.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  20. Back To Top    #20
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: Help needed with pool chemistry

    Can you perform an Overnight FC Loss Test and post results tomorrow morning?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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
  •