Scum on Pond

Discussion in 'Introductions' started by baker_eliz, Jan 24, 2013.

  1. baker_eliz

    baker_eliz

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    Thanks, Meyer. We are not looking for an absolute cure, but the pond is MUCH worse with the aeration. Will this resolve itself over time, or should we add something to coalesce the suspended particles? I'm beginning to think the aeration was a mistake. The pond has never looked so bad in 40 years.
     
    baker_eliz, Jul 24, 2017
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  2. baker_eliz

    Meyer Jordan Tadpole

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    Adding Oxygen to a pond is never a mistake.
    What may have happened in your case is twofold-
    First, the diffuser plates may have sunk somewhat into the accumulated sediment on the bottom of the pond. This, of course, would put more detritus in suspension.
    Secondly, by improving the Oxygen level in the pond and circulating it to the bottom. The bacteria than have the Oxygen that they need to begin breaking down the accumulated sediment into smaller size particles which would easily be suspended by both the diffuser and the Koi..
    It, unfortunately, will not clear overnight. You are dealing with up to 70 to 80 years of sediment accumulation. It may take weeks or months to overcome this.
    For what period of time are you supplying aeration? Ideally it should be done at night from sundown to sunup.
     
    Meyer Jordan, Jul 24, 2017
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  3. baker_eliz

    adavisus

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    A pond can accumulate 4" of sediments a year. If the turbidity bothers you, it's overdue dredging the stuff out of the deep areas

    Dredging every couple of years will help improve the water quality. Or, a regular habit of clearing some out of the deep area, often. Best done when waters are cool, calm and fish less active.

    The pesky so and so's have all night rooting around in the mud, searching for tidbits...
     
    adavisus, Jul 25, 2017
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  4. baker_eliz

    sissy sissy

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    give it time nothing happens over night
     
    sissy, Jul 25, 2017
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  5. baker_eliz

    baker_eliz

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    First of all, many thanks to Meyer and everyone else who is responding. I can't tell you how much we appreciate being able to ask all these questions. --elizabeth

    1. Sunken diffusers: While of course it is possible the diffusers have sunk into some of the sediment, the sand weight underneath the diffusers are about 6" tall and the air bubbles coming to the surface are clear and the turbidity in the immediately surrounding water appears to be no worse than anywhere else.
    2. Dredging: How would one go about doing such a thing when there is no way to get any kind of large equipment to the pond?
    3. We have been running the diffusers 24 hours for the last 2 months. Should we be running them only at night? How much time should we give this? Any idea how long before we should see (positive) results?
    4. Is all the detritus in suspension harmful to the fish?
    5. We added a Pond Boss PRO Block, Bacteria Maintenance, 5 lb. to the pond today.
    6. We are wondering about applying soluble gypsum. How does one go about doing this? We have read that simply broadcasting by hand on the surface is barely, if at all, effective. And, again, there is no way to get any kind of large equipment to the pond. We have a small motorless rowboat but no pump. We have read about doing it via slurry, but no one has said how to actually do that effectively.

    Thanks, again.
     
    baker_eliz, Jul 28, 2017
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  6. baker_eliz

    adavisus

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    Dredging can be as simple as setting a plank on a pedestal in the deep area, walking the plank with a big sturdy net and a plentiful supply of buckets....

    When what is dredged settles in the bucket, pour the clear water off. The gunk can be heaped where you have a veggy bed that likes fertile mud

    A fairly pleasant task on a cool sunny Autumn day
     
    adavisus, Jul 28, 2017
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  7. baker_eliz

    baker_eliz

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    Thanks, adavisus, but I don't think that is very practical for a farm pond of this size.
    --elizabeth
     
    baker_eliz, Jul 28, 2017
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  8. baker_eliz

    Meyer Jordan Tadpole

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    First of all, many thanks to Meyer and everyone else who is responding. I can't tell you how much we appreciate being able to ask all these questions. --elizabeth

    1. Sunken diffusers: While of course it is possible the diffusers have sunk into some of the sediment, the sand weight underneath the diffusers are about 6" tall and the air bubbles coming to the surface are clear and the turbidity in the immediately surrounding water appears to be no worse than anywhere else.
    Considering the age of this pond, there is very likely much more than 6 inches of sediment on the bottom.
    2. Dredging: How would one go about doing such a thing when there is no way to get any kind of large equipment to the pond?
    You certainly have an access dilemma. Another option (which you won't like is to drain the pond and remove the sediment manually. Short of doing that, your present use of an aerator is your only option.
    3. We have been running the diffusers 24 hours for the last 2 months. Should we be running them only at night? How much time should we give this? Any idea how long before we should see (positive) results?
    24 hours a day will not hurt, but running aeration only a night would be sufficient
    4. Is all the detritus in suspension harmful to the fish?
    No.
    5. We added a Pond Boss PRO Block, Bacteria Maintenance, 5 lb. to the pond today.
    Waste of money. this pond (with the aeration) will already has all of the bacteria that it can support
    6. We are wondering about applying soluble gypsum. How does one go about doing this? We have read that simply broadcasting by hand on the surface is barely, if at all, effective. And, again, there is no way to get any kind of large equipment to the pond. We have a small motorless rowboat but no pump. We have read about doing it via slurry, but no one has said how to actually do that effectively.
    Gypsum can be effective in reducing TSS (Total Suspended Solids), but it would not be fast acting either and \, in your case, might require multiple applications.

    Is the aerator somewhat centrally located in the pond? And in a deep section?
     
    Meyer Jordan, Jul 28, 2017
    #28
  9. baker_eliz

    Jhn

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    Dredging via a gas slurry or trash pump (2-3")would work, but would be pretty decent cash outlay on the pump and hoses necessary to do it. You would also need a spot where you could pump the discharged silt and a lot of patience. It will be a slow process, as you have to slowly move the suction hose around the pond bottom.

    Basically how it works is the pump would sit on a float or rowboat, suction hose that reaches the bottom of the pond and enough discharge hose that will reach an area where the silt can be discharged w/o running back into the pond. The pump will suck the silt off the bottom of the pond along with the water. Just keep in mind it will also suck up any small fish or critters that wonder too close to the business end of a 2-3" suction hose.
     
    Jhn, Jul 28, 2017
    #29
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