Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 14 of 14

Thread: Pool turning light green

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Pool turning light green

    After countless trips to pool store for chemicals and for suggestions that did not help my pool or my wallet A friend of mine, whom is registered user on this site (IWilk), introduced me to the TF-100 and helped me get my pool lined back out from being overcome by algae. Took me nearly 2 weeks but all was good. Returned the kit to friend and continued to add chlorine at the recommended level that had stayed true for 5 days straight. I Just opened my new TF-100 kit that I just had to order. Ready to get this pool back to new and usable. 2 days ago water began to turn greenish again.

    Added 22 oz 31.45% Muratic acid to lower Ph. It was at 8.2 yesterday evening.
    1 hour later added 52 oz 8.25% bleach

    Here are my test results as of today
    FC = 1
    CC = .5
    TA = 90
    PH = 7.8
    CYA = 20 I guess (dot disappears for split second but reappears when I stopped adding solution) *repeated test several times with same results

    Are my numbers okay to continue for the slamming process? I'm still in process of adding more muriatic acid to get PH down to 7.5. Pool calculator says add 10 oz muriatic acid.
    Should I not worry on the chlorine level where as I add no more till I get the PH right? I read that that the PH testing levels would be inaccurate once the slamming process is started.

    Thanks,
    Redford

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Pool turning light green

    Is it cloudy green or clear green? Can you post a picture?

    I'm guessing cloudy if you added 52 oz of bleach and you are already back to FC of 1.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Re: Pool turning light green

    It appears to be clear green when taken water sample. Cloudy toward the bottom of the pool though.


    Attachment 31569

    Hopefully this may help.

    Redford

  4. Back To Top    #4

    Join Date
    Jun 2014
    Location
    Tucson, AZ
    Posts
    860

    Pool turning light green

    Did the measure the FC value 1 hour after adding the bleach?

    It's important to know if you even achieved SLAM levels of FC. PoolMath is going to tell you what the theoretical algae-free water FC level is. If you have a significant amount of algae and organics, the minute you added the bleach it starts getting used up. You may never have achieved SLAM level.

    Also, and this is important, you need to get your pH right BEFORE you SLAM. Once you start SLAM'ing, pH is impossible to measure when the FC is above 10-15ppm. The high FC interferes with the ability of pH indicator solution to give you the correct color change.

    Finally, you need to get to shock chlorine levels and MAINTAIN which means in the beginning your going to be making almost hourly checks of the FC concentration and adding/adjust the chlorine as-needed (Pro Tip - stock up on liquid chlorine and test reagents because you're going to burn through your chlorox and chlorine reagents faster than you think). You can't let it drop below shock levels or else the algae will start to grow again.

    You also need to let pumps and filter run 24/7 and brush A LOT in the beginning. The more you agitate the water and get good mixing between the algae and the FC in the water the better. Also keep an eye on your filter pressure as you may need to backwash it several times during a SLAM.



  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Re: Pool turning light green

    @ Sunny, thanks ... No, The measure of FC value was 12hrs after I added the bleach. I will hold off before I start the slam process. Just gave it 3rd dose of acid trying to get the PH down. Will give it an hour and test again. (fingers crossed) hopefully this dose will get my PH right so I can start the slamming process. Love the looks I get with 20 gallons of bleach in my cart at the check out counter. lol

    I will be sure to brush the liner and steps frequently during the Slam process...
    Thanks for the tip.

    Ill keep you posted on my progress.

    Redford

  6. Back To Top    #6

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Re: Pool turning light green

    Retested PH. I just don't get it! The first time I added acid the Level dropped from 8.2 to 7.8. After the second and third time I added acid the test results were the same. PH still at 7.8 and doesn't seem to want to go any lower. I am lost at what to do now. Any sugestions/reasons why the acid isn't changing the PH level like it did the first time?

    Redford

  7. Back To Top    #7
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Pool turning light green

    Did you also enter the current TA in PoolMath?

    - - - Updated - - -

    Are you using the same jug of MA? Is it the same %?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  8. Back To Top    #8

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Re: Pool turning light green

    Quote Originally Posted by Butterfly View Post
    Did you also enter the current TA in PoolMath?

    - - - Updated - - -

    Are you using the same jug of MA? Is it the same %?
    TA=90

    Yes acid indeed is from same container.

  9. Back To Top    #9
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Pool turning light green

    Keep adjusting/testing, using small steps.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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

    Re: Pool turning light green

    That's neon green, not light green! Lol

    Keep adjusting pH til you get it down.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  11. Back To Top    #11

    Join Date
    Jun 2014
    Location
    Louisivlle, KY
    Posts
    6

    Re: Pool turning light green

    @ Casey, I know right! Lol. Sorry the pic is terrible pic but skies so clear the reflection was so bad and I couldn't get a good shot. Also site wouldn't let me post any other pics stateing insufficient room.
    Being Im Not wanting to take so long of time to get rid of algae I went and got some Floculant to help speed up the process. Just broadcasted in pool and running pump for 2 hours then shutting off till tomorrow where I can vacuum to waste.

  12. Back To Top    #12
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: Pool turning light green

    That is unnecessary and a waste of money. You could have just shut the pump off and vac'ed to waste and essentially done the same thing.

    Instead of throwing things in the pool you don't need, just SLAM it. That will take care of everything.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  13. Back To Top    #13
    gtemkin's Avatar
    Join Date
    Jun 2008
    Location
    Seattle, WA
    Posts
    738

    Pool turning light green

    Quote Originally Posted by redford1520@yahoo.ocm View Post
    ......CYA = 20 I guess (dot disappears for split second but reappears when I stopped adding solution) *repeated test several times with same results......
    I believe you want to wait a second after you add drops to let the surface become still and then make a judgement whether or not you can see the dot. You want to be at the point where there's absolutely no way you can see (or even imagine seeing) the dot. So you may have stopped a bit too early, but I think you're in the ballpark.

    Good luck
    21K gal 16' x 40' in-ground pool built 1959, old school with Jacuzzi bronze pump, American Products 24" Sand Filter & Americana Multiport valve, Jandy Lite2 millivolt heater, Coverstar cover, and classic Kreepy Krauly.

  14. Back To Top    #14

    Join Date
    Jun 2014
    Location
    Tucson, AZ
    Posts
    860

    Re: Pool turning light green

    Quote Originally Posted by redford1520@yahoo.ocm View Post
    Retested PH. I just don't get it! The first time I added acid the Level dropped from 8.2 to 7.8. After the second and third time I added acid the test results were the same. PH still at 7.8 and doesn't seem to want to go any lower. I am lost at what to do now. Any sugestions/reasons why the acid isn't changing the PH level like it did the first time?

    Redford
    Add acid slowly. To go from 8.2 to 7.4 or 7.2 (where you want to SLAM) is going to take a lot of acid. You need to add it slowly in small batches and check the pH/TA with each addition. Acid additions are going to lower your TA.

    By the way, are you aerating the water in any way with a spa spillway or water feature? If so, you should stop that for now as aeration raises your pH.

Posting Permissions

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