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Thread: Newbie with a big green hole in the back yard

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    Newbie with a big green hole in the back yard

    Hello all. I am a complete pool newbie who has been thrown into the deep end of a 33,000 gallon gunite pool. The pool is currently green and up until an hour ago I was completely clueless blindly following the advice of the local pool store. I am very happy to find this information source and body of knowledge.

    A quick history on how I ended up here. I purchased a short sale last July. I had no idea how long the pool had been closed. Upon pulling the cover, the only obvious course of action was a complete drain. I even found a car tire in the thing! After a line pressure test, a serious pressure washing and 33,000 gallons of water, I was feeling good until I noticed the water steadily drained. I had to keep topping it off every evening to keep the skimmer full. The pump also failed at the end of the season when the leaves were falling. I closed it with professional help as soon as possible and got most of the leaves out, but a small number remained upon closing.

    I removed the cover 3 weeks ago and found the water level at the light cavity so I plugged it with butyl. I replaced the pump motor, seals and impeller. I then filled with well water (pool trucks are so expensive) and it has held! The bad news is the water is still green after 3 weeks of adding chlorine and non-stop filtering. I have also used the net on a pole to remove leaves from the deep end of the pool. I can see the bottom of the shallow end. I have also vacuumed and brushed the pool numerous times. I have power washed the filter cartridges countless times. I had the water tested numerous times at the pool supply store and each time they suggest I keep shocking it.

    I am learning that the simple test strips showing high this, low that aren't sufficient to combat my algae problem and I'm tired of being an open wallet to the pool supply store. I am determined to get a handle on this pool.

    I have ordered a Taylor Complete FAS-DPD Pool Water Test Kit K-2006 and new filter cartridges. I know this will be a loaded question without necessarily knowing the chemical makeup of my water, but is there anything more I should do while waiting for the kit and filters? The pool is currently green, but I can see the bottom in the shallow end (about 4 feet deep).

    Many thanks in advance for any advice


    Pool specs
    33,000 gallon gunite shaped pool
    sta rite cartridge filter
    Hayward 1.5HP
    Hayward chlorinator
    Attached Images Attached Images

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    Casey's Avatar
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    Re: Newbie with a big green hole in the back yard

    Welcome!

    Keep dredging the bottom of the deep end for leaves. Not much else you can do except for dumping a gallon in every evening to keep it from getting worse. Once you get your test kit, run a full set of numbers and post them up and we'll help you get started on SLAMing Your Pool.

    In the mean time, I offer you these Pool School Links to read:


    ABC's of Pool Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    PoolMath

    You're going to kill the green beast and enjoy your pool this summer!
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Re: Newbie with a big green hole in the back yard

    I have turned a corner and have the green monster on the run. It is no longer green, but instead a cloudy, powder blue. I have been flying blind a bit using only my test strips, but have made sure to keep feeding it copious amounts of chlorine. I'm sure I overshot, but felt it was better to do that then to let the monster take hold while waiting for the test kit.

    I spent the better part of the day cleaning the filters again (I have been cleaning them daily) and vacuuming the algae corpses from the bottom of the pool. I have been vacuuming, brushing and cleaning the filter cartridges daily.

    This morning, the filter kit did not arrive yet so I took a sample to the pool store to get it analyzed. They used test strips and machine to scan and read the results. Here is what they came up with.
    TC - 10 (this is the max on their chart) it is likely much higher than that.
    FC - 10 (again, this is the max on their chart)
    pH - 7.7
    TA - 80
    CH - 250
    CYA - 10

    My test strips were showing similar results.

    The Taylor test kit, new cartridge filters and a dolphin robot just arrived so I will take some measurements in a short while. Here is what the pool looks like now.




    Last edited by GoatFarmer; 06-28-2014 at 06:46 PM. Reason: fixed image tags
    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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    Re: Newbie with a big green hole in the back yard

    My test results are as follows
    FC: 31
    CC: 1
    PH: 7
    TA: 90
    CH: 250 (fading endpoint encountered)
    CYA <30

    The low PH doesn't surprise me considered the pool store directed me to add 192oz of sodium bisulfite when I opened the pool.

    So it looks like I need to make some adjustments, but I'm not sure of timing considering I'm still SLAMing.

    Should I wait till I'm finished with the SLAM and my FC is at a more reasonable level and then check the PH again or should I add half of what is needed to reach my target?
    I plan to finish the SLAM with my old filter cartridges so I will be vacuuming and cleaning my cartridges daily which will yield a small amount of water loss. I have plenty of stabilizer on hand.
    Should I target CYA of 30 considering my pool is heavily shaded by big trees on 3 sides and a house on the other?
    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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    Re: Newbie with a big green hole in the back yard

    Continue the SLAM. For now, you do not have to test or adjust ANYTHING except FC which should be kept up around 12 ppm or so AT ALL TIMES.

    There is a lot involved in the SLAM (brushing, cleaning the filter, backwash, etc) so make sure you stay up with thos but, most importantly, keep your FC up at SLAM value and your pool will clear.

    The last part of the SLAM is the OCLT which you should only do after your water is crystal clear.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Newbie with a big green hole in the back yard

    Welcome to the forum
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

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    Re: Newbie with a big green hole in the back yard

    The water is clear! Not quite crystal clear,but I can clearly see the main drain in the deep end (11ft). I will retain SLAM level and then check FC loss tonight.


    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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    Re: Newbie with a big green hole in the back yard

    Quote Originally Posted by GoatFarmer View Post
    The water is clear! Not quite crystal clear,but I can clearly see the main drain in the deep end (11ft).

    Life is good !!
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

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    Mod Squad kimkats's Avatar
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    Re: Newbie with a big green hole in the back yard

    Good job! Keep it up and you will be able to see heads/tails on a coin soon!

    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: Newbie with a big green hole in the back yard

    Brushed and vacuumed again today as well as cleaned the cartridges. No discernible difference in clarity.

    FC 20.5
    CC 1


    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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    Re: Newbie with a big green hole in the back yard

    The water is clear and my overnight loss was only .5 last night. I think I'm in the clear.
    FC = 11.5
    CC = .5
    PH = 7.1
    CYA < 30
    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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    Re: Newbie with a big green hole in the back yard

    Congratulations!

    pH reads high with FC>10, let your FC drift back down and re-test your pH.

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    Re: Newbie with a big green hole in the back yard

    Pool leaks again. Adding additional water will throw things off a bit, but I'll eventually get it sorted. I think all the vigorous scrubbing jostled the butyl loose in the light cavity. I'll search for others that may have had a similar issue.

    At least the water is sparkling now.


    33,000 gallon gunite shaped pool (built 1974) | 450sq ft Sta-Rite System 3 cartridge filter | Hayward 1.5HP | Hayward chlorinator

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