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Thread: Another Green Swamp

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    Another Green Swamp

    Split by moderator. Please create your own thread and not hijack others. Thanks, jblizzle

    Im in the same boat. Concrete in ground pool was covered last fall with a mesh type cover that kept bigger material out like leaves, sticks, etc. It should be noted that the cover sagged into the water and a considerable amount of leaves collected in it over the winter and this material has since been cleared out already. The water is dark green, the walls are covered with a green filmy substance (possibly algae?) and there is dark green suspended matter floating freely in the water that can be collected by dipping the hand skimmer into the water and scooping it out.

    Scooping the suspended particulate out with the hand skimmer would be a tedious pains taking procedure that would take days as you only get a handful of debris per scoop. What would be our best approach from here? Should we try to deal with what is currently in the water now or would it be easier and less hassle just to drain it and fill with new water?
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Mod Squad Bama Rambler's Avatar
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    Re: Another Green Swamp

    Welcome to TFP.

    How big is your pool?
    How old is the plaster?
    How much does water cost you?
    Do you have to pay a sewer fee?
    If so can it be waived for pool fills?

    If you start shocking now, most of the debris will either clump together and float to the top or sink to the bottom.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Another Green Swamp

    The pool is about 25000 gallons and the plaster is 35 years old. A water fill would cost around the neighborhood of $175, probably a tad higher, and there is a separate sewer fee. Ive talked to the water people and they claim that there is no pool owner water exemption and the rates are based on usage which is kind of annoying. Draining the water and a clean refill would be ideal except for the water costs.

    Since posting here we have called around for pool service people and they would do the shock method and run the filter so weve decided to do that ourselves rather than pay somebody else unless there is another as yet unexplored preferred alternative.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Richard320's Avatar
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    Re: Another Green Swamp

    Welcome!

    turning-your-green-swamp-back-into-a-sparkling-oasis-t4147.html has directions.

    Pulling out the chunks calls for a leaf rake.


    and a lot of this:


    and some inspiration:
    a-little-encouragement-for-those-with-algae-and-new-to-bbb-t57137.html
    another-green-swamp-for-you-guys-t46450.html pics on page 1 &4 are worth a look

    And we like pictures. Lots of pictures.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Another Green Swamp

    It looks like the easy way would be to drain and refill. The other way looks to be very tedious and time consuming. Now I have to convince the other homeowners. I appreciate the advice.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Re: Another Green Swamp

    I'm on Long Island with a 33,000 gallon free-form in-ground pool (it looks like a large koi pond). The pool is surrounded by 30 foot pines, junipers, maples, azaleas, etc. - a true Japanese garden. If this isn't enough, I also have a weeping blue atlas cedar stretching across the center of the pool. Unfortunately, I also have a mesh cover. No matter what I do in the fall or winter, every spring when I remove the cover, I face a green swamp. Usually, it takes a week to clear the algae. While the process is time consuming, I'm sure the landscape designer's desire was to teach patience. Patience and following Jason's post to a "T" work wonders.
    Bill

    33,00 gal in-ground free-form
    Hayward pump and DE filter

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    Re: Another Green Swamp

    If we bail out the pool is there any need to hose down the walls of the green residue as the water level drops or will that go away when the water is added back and the chemicals are back in spec? Im concerned that the algae on the walls will dry on there but elsewhere on this forum I read where its just organic matter and the chlorine will eventually remove it.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Mod Squad jblizzle's Avatar
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    Re: Another Green Swamp

    What would be the point of draining the pool if you are going to leave all the organics on the walls?

    I would pressure wash off the walls while I was draining and get all the stuff pumped out.

    You will still have to follow the shock process once you refill, but the more organics you remove, the faster the process will go.
    Jason, TFP Moderator
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    Re: Another Green Swamp

    Dudek - Draining a pool can be a big undertaking. Before doing this, you might also want to read about draining your pool and the problems you might encounter if you happen to have a high water table and hydrostatic pressure. While not common, you really don't want your pool to pop. I have a friend who had this happen. It was ugly. BTW - I'm now 2 1/2 days into this with my green/black pool. It is now a medium green. I expect it should be somewhat clear by Saturday. It just takes time.
    Bill

    33,00 gal in-ground free-form
    Hayward pump and DE filter

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    Re: Another Green Swamp

    If it's of value -

    This is what my pool looks like today - 2 days into its cleanup:




    It was far worse last year - really black/green and not green black. I'm guessing that Hurricane Sandy helped with evergreen needle and leaf removal - sending away much of the crud that usually sifts through my mesh cover.

    That said, this is the pool's appearance last summer:

    Bill

    33,00 gal in-ground free-form
    Hayward pump and DE filter

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    harleysilo's Avatar
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    Re: Another Green Swamp

    OMG that tree, simply beautiful!
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    Re: Another Green Swamp

    We might start out running the pump and shocking the water and see how that goes. If its becoming too tedious a drain and refill would be the quickest and least labor intensive way to get the green muck out of there without all the headaches. Weve drained the pool before and there are 2 hydrostatic relief valves to unscrew in the deep end if we were going to drain it completely. This time I would leave about 3-4 feet of water in it so we could clear out most of the green water and hose down the walls as it drains before we start adding water and chemicals.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Re: Another Green Swamp

    Quote Originally Posted by Dudek
    We might start out running the pump and shocking the water and see how that goes. If its becoming too tedious a drain and refill would be the quickest and least labor intensive way to get the green muck out of there without all the headaches. Weve drained the pool before and there are 2 hydrostatic relief valves to unscrew in the deep end if we were going to drain it completely. This time I would leave about 3-4 feet of water in it so we could clear out most of the green water and hose down the walls as it drains before we start adding water and chemicals.
    It has just taken me 12 days to get our 8 metre by 25 metre pool from sludge to almost sparkling. Draining all that water isn't really an option. Another couple of days should get us there. Wasn't really all that tedious. Just keep the chlorine up to shock level as much as you can, and let the chlorine and filters do their work. It really is just a matter of patience. Last year my pool was a nightmare, but these guys got me through it.
    400,000 Litre in ground infinity pool, with 40,000 litre holding tank (116 235.703 04 gallon). Vinyl liner.
    Two Astralpool Cantabric sand filters, 900mm diameter, each with 550kg of sand.
    Two ESI MP6 1.5kw 3 phase pumps.

  14. Back To Top    #14

    Re: Another Green Swamp

    Quote Originally Posted by OliveGrove
    It has just taken me 12 days to get our 8 metre by 25 metre pool from sludge to almost sparkling. Draining all that water isn't really an option. Another couple of days should get us there. Wasn't really all that tedious. Just keep the chlorine up to shock level as much as you can, and let the chlorine and filters do their work. It really is just a matter of patience. Last year my pool was a nightmare, but these guys got me through it.
    I'm not sure why draining the water wasn't an option for you but if you could have drained the water would you have done that instead?
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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    Re: Another Green Swamp

    Quote Originally Posted by Dudek
    Quote Originally Posted by OliveGrove
    It has just taken me 12 days to get our 8 metre by 25 metre pool from sludge to almost sparkling. Draining all that water isn't really an option. Another couple of days should get us there. Wasn't really all that tedious. Just keep the chlorine up to shock level as much as you can, and let the chlorine and filters do their work. It really is just a matter of patience. Last year my pool was a nightmare, but these guys got me through it.
    I'm not sure why draining the water wasn't an option for you but if you could have drained the water would you have done that instead?
    400,000 litres is an awful lot of water. Nope, wouldn't have drained anyway.
    400,000 Litre in ground infinity pool, with 40,000 litre holding tank (116 235.703 04 gallon). Vinyl liner.
    Two Astralpool Cantabric sand filters, 900mm diameter, each with 550kg of sand.
    Two ESI MP6 1.5kw 3 phase pumps.

  16. Back To Top    #16

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    Re: Another Green Swamp

    This is now day a day 4 photo. You'll note the difference. The first couple of days, it always feels like no headway. Today, big improvement and most of this has happened between 8:00 AM and 3:00 PM. I'm not really a slave to this. While I got the pool water "generally" into balance on Monday, I usually only check for FC levels until I can see the floor drain. I also brush every other day and backwash as needed. Mostly, the filter and chlorine do all of the work.

    As for OliveGrove's pool - I cannot imagine what my water bill might look like if I were replacing 400,000 liters of water! Yikes!

    Bill

    33,00 gal in-ground free-form
    Hayward pump and DE filter

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    Re: Another Green Swamp

    Quote Originally Posted by BB

    As for OliveGrove's pool - I cannot imagine what my water bill might look like if I were replacing 400,000 liters of water! Yikes!

    Exactly. Although our water comes from an artesian well. Our problem is that the water table is on chalk, so our water is very high in calcium. As far as possible we like to let the rain water fill the pool. Impossible of course, but every little helps.
    400,000 Litre in ground infinity pool, with 40,000 litre holding tank (116 235.703 04 gallon). Vinyl liner.
    Two Astralpool Cantabric sand filters, 900mm diameter, each with 550kg of sand.
    Two ESI MP6 1.5kw 3 phase pumps.

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    Re: Another Green Swamp

    Dudek - if you go ahead with the chlorine - make sure you look closely at the shock level for your pool size on the pool calculator. I tend to error on the higher side. I also have a large Hayward 6000 DE filter and I usually start with a 1/2 load of DE under the assumption that the captured debris in the filter also helps catch much of the algae and those little green clumps. I could be wrong about this - but it seems to work. If this were a sand or cartridge filter, I'm guessing back washing might become a constant and very tedious chore. Regardless, as the water clears, I begin adding more DE following a good backwash and rinse.
    Bill

    33,00 gal in-ground free-form
    Hayward pump and DE filter

  19. Back To Top    #19

    Re: Another Green Swamp

    Quote Originally Posted by OliveGrove
    400,000 litres is an awful lot of water. Nope, wouldn't have drained anyway.
    In that case it wouldnt make sense to drain and refill. After reviewing our options weve decided to go ahead and drain the water and refill with fresh.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

  20. Back To Top    #20

    Re: Another Green Swamp

    Quote Originally Posted by BB
    Dudek - if you go ahead with the chlorine - make sure you look closely at the shock level for your pool size on the pool calculator. I tend to error on the higher side. I also have a large Hayward 6000 DE filter and I usually start with a 1/2 load of DE under the assumption that the captured debris in the filter also helps catch much of the algae and those little green clumps. I could be wrong about this - but it seems to work. If this were a sand or cartridge filter, I'm guessing back washing might become a constant and very tedious chore. Regardless, as the water clears, I begin adding more DE following a good backwash and rinse.
    We have a sand filter and we are trying to avoid the tedious parts as much as possible. We're going to drain and refill.
    25,000 gallons, IG, plaster
    Sand filter, ITT Marlow 3/4 HP single speed pump
    Eastern PA, pool is 40 years old

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