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Thread: The Green Lagoon!

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    The Green Lagoon!

    I will start by saying, I apologize if my tone comes across as short, angry or rude...believe me it is just frustration at myself. I'm in my 4th year of owning a pool, and I've learned a lot. However, I cannot for the life of me keep my water clean, clear and pretty. most of my neighbors also have similar pools and I feel like they are never outside vacuuming or messing with their pools, but I am...constantly! Basically if I don't vacuum for a day or sometimes two, the water is clear but green, but the bottom is such that I have to vacuum to waste. This happens while my FC levels are usually between 3-5ppm.
    I've posted about this in years past, I've read the articles, I've read the ABC's of Chemistry and have recently read the SLAM article. I tested the water using the Taylor kit recommended to me by the people in this forum. What I would really, really appreciate is if somebody could just let me know what I need to buy and do to fix this, for now and in future years, because it drives me absolutely bananas. I'm not really good at seeing these numbers from the test and translating that into the right information in the booklet to implement what I need to.

    Tested the water tonight using the Taylor kit and readings are below...thank you!

    FC-13 (dumped 4 gallons of liquid chlorine in there earlier this afternoon, hoping to shock it away)
    CC-minimal, but some
    pH-8 or 8+ (i'm red/green colorblind which doesn't help, but comparing it to the chart in the middle it was at least as red/purple as the 8.0 reading)
    Alk-300 ppm
    CH-175 ppm.

    Any and all help is greatly, greatly appreciated because I think this is much harder than it's supposed to be and I would like actually enjoy my pool at some point instead of staring at the green water and cursing at it! haha...thank you thank you thank you!
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

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    Texas Splash's Avatar
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    Re: The Green Lagoon!

    Totally understand! Been there. So let's try to keep it very simple right now:
    - Green water does in-fact mean SLAM per Pool School - SLAM - Shock Level And Maintain. But you can't SLAM if you don't know two things: FC and CYA. I see your FC above, but I don't see the CYA. So why is that so important?
    Look at this chart: Pool School - Chlorine / CYA Chart. When you know your CYA, THEN you find the correct FC for that CYA. That's the only way to really know if your chlorine (FC) is high enough. Forget the old pool store "5 FC is high" nonsense. It's not if your CYA is 70 (see the chart).
    So, do these things before you do anything else:
    1 - Test your CYA. If it's over 70 or so, you have a decision; SLAM at that high level or do a partial drain to lower the CYA
    2 - Adjust PH before starting the SLAM. A PH of 7.2 is ideal to start a SLAM (you can only validate PH if FC is below 10 though)
    3 - 30 minutes after treating your PH, increase FC with bleach and keep it there 24/7 until you pass the 3 SLAM criteria.

    Let us know of you have any questions about what to do next. Hang in there!
    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.
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    Mod Squad pooldv's Avatar
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    Re: The Green Lagoon!

    The PH test is not valid when FC is above 10ppm. Either use a PH reading from before adding the chlorine or let it drop to 9ish and test PH. With algae in the pool the FC will drop pretty fast.
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    Re: The Green Lagoon!

    Thanks for the help guys. i will test the FC again this morning and see if it's dropped. Then I'll go with the CYA count and see where it's at. I've put that in last year and twice this year, and according to the directions on the bottle it says you don't have to keep putting it in, but we'll see where it's at. So just to clarify, do i adjust the CYA level (what if it's 0??) or do I use the CYA to figure out the chlorine level? Once I know the CYA level, I just keep the chlorine at the corresponding level according to the chart linked above?

    I'll re-post test result readings as well.
    Thanks again!
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

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    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    HI and we will get you to having a pretty, clear pool! It can be easy!

    For right now just post your morning tests.

    We will go from there a step at a time.

    HUGS!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Texas Splash's Avatar
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    Re: The Green Lagoon!

    Dpeat14,yeah, this has been a strange year for CYA. But typically once it's added, it stays there unless you drain water and refill. In any case, you have the right idea. Verify your CYA first and adjust if needed. When your water is cloudy or green, the ideal CYA is about 30 so you use less bleach to SLAM. But if it's higher, you can still SLAM. Yes, as you mentioned, validate that CYA first, then go back to the chart and find the corresponding FC level for that CYA. That's the easy part. After that (while SLAMming), it's a matter of "maintaining" that SLAM/Shock FC level. Hope it all works out for you. Let us know if you have more questions.
    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!

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    Re: The Green Lagoon!

    Alright...here is the latest. As mentioned above, I know there are charts and links and articles to fix this, but I'm at a point, where I think I need some step by step with this to make sure I'm not screwing it up. I've read the links and I've used the charts, but what can I say, I'm no Walter White when it comes to chemistry! ha! Here is what I just got on my test...

    Water is clear, I can see the bottom very well, but it's still that greenish/blue tint.
    FC-7.5
    CC-0-.5
    pH-7.8 (took 6 drops in the acid test to drop it to 7.2)
    Alk-300 ppm (took 12 drops using a 10mL sample, x25)
    Cal-275 (took 11 drops using a 10 mL sample, x25)
    CYA- lower than 30...using the Taylor test kit, the black dot got cloudy but it never disappeared. The test tube only goes to 30

    So, next step is??? Thanks thanks thanks!
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

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    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    Step by step here we come!

    PH-I want it at 7.2 please...............From pool math add 52 oz of muriatic acid.

    -Put in slowly in front of the return with the pump on. USE care, some kind of glasses on and turn your head away.

    -Test it again n 30 mins. to make sure it is where you want it.

    I will let you do that and get back to your next step.

    Kim

    - - - Updated - - -

    So here is your next step--------

    We are going to act as if you CYA is 20. I want your CYA at 30 (it acts as sunscreen for you FC)

    Pool math says add 72 oz. of CYA. You can buy it at Walmart. Put it in a sock and let it hang in front of the return. You can and should squeeze it when you are out there to get it in your pool faster.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    Your last step----------make sure PH is at 7.2 then SLAM the pool!

    For right now you will..................

    add 411 oz of 8% bleach. That should get you from FC 7 to FC 12 using this chart.

    Pool School - Chlorine / CYA Chart

    Do what you have to do to keep your FC AT or a little above FC 12.

    I hope this helps! Let me know if you do not understand or have any more questions.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: The Green Lagoon!

    Ok...so cya first? Then pH and then chlorine? Also, when I've done the cya in the past it sits in a sock but doesn't really dissolve all the way. Do I wait until it's gone or just until the test gives the correct number? If it goes higher than 30 is that a problem?

    Thanks again!


    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

  11. Back To Top    #11
    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    PH first please.

    The CYA and chlorine can be at the same time.


    CYA-----you can/should squeeze the sock it is in to help is dissolve. Put in the 72oz CYA pool math asked for.

    Don't bother testing for the CYA until a week from today. It takes that long to show up in the water.

    Going back over it..............

    Lower PH to 7.2 test in 30 mins to make sure it is there.

    Put CYA in sock while you are waiting to PH to show how low it went.

    Once PH is at 7.2 add the chlorine to SLAM level and keep it there.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: The Green Lagoon!

    Isn't shock level 12 ppm for a CYA of 30? Why are you targeting 20?
    16 x 32 inground vinyl pool (21000 gallons) (new liner installed 2014)
    Hayward max flo pump w/ 1 HP AO Smith motor (new motor 2014)
    Hayward C1200 cartridge filter (new 2014)
    Hayward H150 heater

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    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    Quote Originally Posted by Sminor View Post
    Isn't shock level 12 ppm for a CYA of 30? Why are you targeting 20?
    You ^^^^^^^ are correct! I was wrong. I had two windows open and was helping two people at one time and got them mixed up THANKS for catching it!

    Kim (who will only work on one thread at a time from now on.)

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  14. Back To Top    #14

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    Re: The Green Lagoon!

    I started the process tonight. I vacuumed the pool thoroughly and then added in some ph downer and a some cya. It actually looked pretty good today before I did that, but still not quite that sparkly pretty stuff I'm aiming for. I'll retest in the morning and keep you all posted and let you know if more questions or problems arise. Thanks again!
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

  15. Back To Top    #15

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    Re: The Green Lagoon!

    pH and CYA are all set so the SLAM has begun. I'm aiming for a 12 ppm FC count, but how long do I keep it up that high?
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

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    Re: The Green Lagoon!

    Keep it that high until your water is clear and you pass the OCLT.


    Type: IG Vynal
    Size: ~ 22,000 GAL
    Filter: Sand - Hayward S244T Pro Series w/ 1HP Hayward Pump

  17. Back To Top    #17

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    Re: The Green Lagoon!

    OCLT? And of course, once I got the water where I want it we get our first big rain in over a month!! Aaaaaargh!
    26,000 gal, AG, cartridge filter.
    Hayward Power Flo LX, 1.5 HP pump
    Install date unknown (pool came with house I bought in 2012)
    Taylor K-2006 FAS-DPD Test Kit

  18. Back To Top    #18

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    Re: The Green Lagoon!

    if are asking how long to keep shock level, and asking what an OCLT is, then you need to re-read the links that were provided for you in the second post of this thread. Follow that process.

    OvernightChlorineLossTest. Did you lose more than 1ppm FC at shock level overnight. Sun goes down, last test and dose of the night. Wait at least 30 minutes. Retest FC.
    Let pump run all night (which it should be anyway since you are slamming)
    Before sun up, retest FC. Did you lose 1ppm or more?
    10,500 gal IG, Topaz Pebble, auto-level
    Hayward DE filter, 2HP Ecostar VSP, ProLogic PS-4, GVA actuators
    Cal Pools Wave Force Plus (wall return jets plus 2 floor pop-ups), Venturi Skimmer
    Water sheer, 2 wok pots, bubbler stem on the baja step
    ColorLogic Mutlicolor LED lamp. Taylor 2006+speed stir

  19. Back To Top    #19
    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    We have a link for that!

    Pool School - Perform the Overnight FC Loss Test (OCLT)

    This is a test you will want to print out and do even once you get your water clear. I do it about every other week just to make sure there is no yuckies trying to show their heads.

    LOL on the rain! OF COURSE it rained!

    kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  20. Back To Top    #20
    Mod Squad kimkats's Avatar
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    Re: The Green Lagoon!

    Now Chris that post was a long time ago and many posts up LOL

    That is one reason I just post links as the need comes up.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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