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#38498 10/12/05 06:58 PM
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I have a 4.5 have pond located in Georgia. 24 hours ago it was perfectly normal. This afternoon when I went to feed the fish (coopernose bream) there was this green film covering about 1/2 of pond. Have no idea what it is?
TedJ

#38499 10/12/05 08:46 PM
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tree pollen? Any thin coverings on windshields?

#38500 10/12/05 09:11 PM
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TedJ - You probably have an algae bloom that can form surface films such as a species in the genus Euglena. But note that other forms of algae can also form surface films. Some bluegreen algae will form green films in the warm water of mid summer and fall. Pollen films on water are more common in the spring rather than fall.


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#38501 10/13/05 05:16 AM
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I have another pond about 1000 ft away from it with a clean surface. If its a algae bloom will it hurt anything and about how long does it last?
TedJ

#38502 10/13/05 07:31 PM
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i have a 6 acre pond in sout louisiana and i just got the same thing.it happened in about 2-3 days,i sprayed it with cultrine plus this evening hoping it will help.it sure is ugly stuff,i've never seen anything like it before.kind of looks like a oil spill the way it floats on the surface.what can we do to clean it up?

#38503 10/13/05 07:46 PM
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TedJ - Thin "mild" surface algae films are usually harmless; more visually offensive than harmful to fish and other aquatic life. Thick surface films can be bluegreen algae their affects are debatable. The type of species causing the bloom will determine its impact on the overall pond. It is often a case by case basis.

Cutrine Plus (liquid) based spray will kill most of the algae in the surface film especially when it is pushed to one end or side by a gentle breeze.

pat - about cleaning it up. When it dies, either naturally or due to treatment, it will sink to the bottom and decompose. Nuisance algae blooms give one a small idea of how productive a nutrient enriched pond can be.


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#38504 10/14/05 05:18 AM
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Bill, what normally causes the bluegreen type to affect a pond.Could you please explain the last parag.in your post.Not sure i undersatnd what you are trying to tell us,that our pond is in good shape are bad.Thanks

#38505 10/14/05 10:47 PM
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Thick bluegreen algae films or layers can be bad in several ways, taste and odor in fish flesh, cause of low DO in deeper waters, unsightly, overall poor water quality, some types can be toxic to animals drinking the water.

Most of the nuisance blue green algae can get their nitrogen source from the atmosphere and not the water. Most of the nuisance bluegreen film, surface, algae types grow best in the heat of the summer and are indicative of too many dissolved nutrients in the water, especially phosphorus. Thus fertile fish ponds often have bluegreen algae blooms in the warmest summer months.

The production of all that plant mass on the surface is just a small protion or fraction of what a pond is capable of producing.
Did I answer your questions or do you have more? Try to be specific with questions.


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#38506 10/15/05 03:53 AM
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Bill,I sprayed some Cultrine Plus yesterday and it seemed to help,At what water temperature will it die off??? Thanks

#38507 10/15/05 02:58 PM
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There is not an exact water temperature where the bluegreens will crash. Temperature thresholds tend to be species, variety or even strain specific. It even gets more compicated and sometimes other things besides temperature cause densities to decrease or even crash. Some species have narrow tolerances whereas others have wide ranges of tolerance. Nothing is usually real simple in natural systems.

Generally cooler waters than approx 78F-82F, will start slowing their metabolism and then other species are better able to compete. Nutrient balances or ratios and other environmental factors also play a big part in growth cycles.


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#38508 10/23/05 12:25 PM
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This foam was along the shoreline of my dam.From a distance it looks like styrofoam Can temp drops cause the foam to form? 32 deg this morning. - Thanks


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#38509 10/23/05 03:31 PM
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Mr willy - I commonly see foam similar to this on other waters; streams and ponds. I think it is due to abundant dissolved and or suspended proteins in the water combined with agitation of the water. The foam forms from wind action or surface agitation that causes the proteins to collect as foamy material. Cool temperatures may cause the foam to form more easily. Protein skimmers are often used in the intensive aquaculture (indoor) industry and by aquarium hobbists to produce this type of foam in their fish tanks. A search of protein skimmers may tell you more about dissolved proteins in the water. Sometimes I look at it microscopically to make sure that it is not something other than what I described above.


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#38510 07/03/07 09:17 PM
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I need to revisit this thread with a question pertaining to my BG pond. Up until the last week or two, my BG pond, aside from tea brown water, was looking good. Secchi disc readings were dropping from 3.5 feet to about 20" now. Surface temp 80 degrees, water pH around 8. Summer temps have moved in with 80+ degrees being the norm mixed with a few days in the low/mid 90s last week.

The intermittent stream that feeds this pond is now dry. Current water levels are 2-3" below my stone dam which was built across the outlet of this small 0.12 acre puddle. We had a brief rainstorm this past weekend, which was the transistion front from the 90s last week to the more seasonal temps now.

In addition to the main topic of this thread, a green film that covers the pond, there is also a film of goo that I can only describe as looking like liquid driveway sealer. This stuff only resides on the surface and is easily dispersed when the aerator kicks on. A sample jar of water, taken from arms length below the surface 4 days ago, is clear. The watershed on the east side of this pond consists of tall grass with trees (nature's piece) while the west side is lawn. No chemicals used, I just mow it on a weekly basis.

My question pertains to this black goo and what is it? Cody above mentions algae films. Could this be the result once the green algae dies off? Other than being a visual nuisance, I don't think the fish are being affected. I'm sure it would be no problem to skim this stuff off using BZ's prickly rope.

Thanks in advance for all replies.

#38511 07/04/07 08:42 AM
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Russ a pic would help. I have seen the thick algae of different colors mix and die and be dark brown and a thick goo around the down wind side of the pond.
















#38512 07/04/07 07:51 PM
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Eric,

Thank you for the reply. We've had rain for most of today so I'll have to wait till tomorrow to see what the pond surface looks like.

#38513 07/05/07 12:33 AM
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Ah, the prickly rope time of year has come again. I have to say since improving this idea last year I'm using it about once every two weeks now and my pond has never been cleaner and nicer looking. I use it mostly for removing duck weed but it cleans out everything else that floats too. I get some of the black floating goo once in a while. Comes right out with the duck weed. The prickly rope is my best ever pond cleanup tool for mid summer floating stuff blues. I've got a system down in my pond where it only takes me 1 to 2 hours to do a complete cleanup.


Gotta get back to fishin!
#38514 07/05/07 07:42 AM
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The combination of yesterdays rain and showers throughout the night has resulted in no more black goo in the pond. This morning, only the green film is visible.

BZ, any idea what the black goo was??

#38515 07/05/07 07:53 AM
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 Quote:
Originally posted by bz:
Ah, the prickly rope time of year has come again. I have to say since improving this idea last year I'm using it about once every two weeks now and my pond has never been cleaner and nicer looking. I use it mostly for removing duck weed but it cleans out everything else that floats too. I get some of the black floating goo once in a while. Comes right out with the duck weed. The prickly rope is my best ever pond cleanup tool for mid summer floating stuff blues. I've got a system down in my pond where it only takes me 1 to 2 hours to do a complete cleanup.
Can you be more specific on how you do this? I get you are using a floating rope to corral the stuff but what do you do to the rope to make it "prickly?"


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#38516 07/05/07 07:55 AM
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Cecil,

Here is a link with pictures.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=14;t=000275#000000


BZ, did you ever add more zip ties to the rope?

#38517 07/05/07 09:25 PM
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Thanks for finding the post Russ. I'm not very good at finding this old stuff. I did add more zip ties. I randomly added about 150 more to the 100 foot rope so they are a lot thicker. It really works well now. I have no idea what the black goo is. I'm guessing its bottom sediment that is full of anaerobic bacteria cause when I scoop it out it stinks like hydrogen sulfide. Even though it's floating it's very heavy like mud so I think it must by decaying stuff mixed with bottom dirt.

Cecil, I hope you find what you're looking for. If you need a source for the float I probably have the company name around here somewhere. The key to making this work is enough zip ties and enough small floats to keep it on the surface so it won't slip down under the duck weed. I shopped around a lot to find the right size floats for a cheap price.


Gotta get back to fishin!
#38518 07/09/07 07:34 PM
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The black goo returned again this past weekend. Another shower dumped some precip on us last night and this morning, the black goo was gone. Interesting stuff. Today the pond looked good with a small amount of the green film floating on the surface.

#38519 07/10/07 01:10 PM
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Russ, I've noticed the black goo and the FA will get entrapped air in it and float. When you get a good rain it will beat the air bubbles out and it will sink. That's why it disappears. It will come up again later. I suspect the black goo gets trapped gases from decomposition and the FA gets trapped gases that it produces as part of photosynthesis. That's my theory and obeservation.


Gotta get back to fishin!
Bill Cody #96374 09/07/07 02:37 AM
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I have the same thing happening in my pond, but the film is not green, it's a reddish brown. Would this also be an algea bloom?

Kent #96408 09/07/07 09:38 AM
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Does it look like this ?



A red euglena (algae) bloom
















ewest #96478 09/07/07 10:43 PM
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Eric, it's hard to tell from your picture, but it's close to a rust color. It's on the surface just like a green algea bloom. It's just about taken over the whole pond surface except where my aerator is located.

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