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What is this brown scum?
#523122 07/01/20 07:36 AM
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bcraley Offline OP
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What is this brown scum? I first was thinking pollen, but I wouldn't think pollen would have the bubbles. It drifts over the pond to the downwind side. This morning we have a nice breeze so its all contained on the southwest corner and pushed into the rocks. The pictures are from last night when we had very little wind and it was more sprawling. I tried to rake it, but there isn't really anything to rake... just a film that flows like water on the surface. Frogs and other small creatures are thriving.

I've been regularly checking visibility and I'm 18-24" both morning and evening. I rarely get more than 24" of visibility due to my dogs constantly keeping clay suspended.

Running bottom aeration 24/7 and I used blue dye mid-April because I was having some pondweed beginning to grow.

Additional pictures are for reference purposes.

Attached Files
pondScum1.jpg (53.56 KB, 84 downloads)
PondScum.jpg (60.51 KB, 65 downloads)
pond.jpg (34.76 KB, 60 downloads)
Fry.jpg (17.47 KB, 49 downloads)
Re: What is this brown scum?
bcraley #523128 07/01/20 09:57 AM
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Possibly cytoplasm from dead plankton.
















Re: What is this brown scum?
ewest #523131 07/01/20 10:28 AM
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If that's the case, then nothing of concern, right?

Re: What is this brown scum?
bcraley #523133 07/01/20 10:32 AM
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How is the rest of the pond activity ? It is indicative of a productive plankton community - that can cause wide swings in pH and O2 levels but not always or even often.
















Re: What is this brown scum?
ewest #523135 07/01/20 11:56 AM
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As far as I can tell my pond is in good shape. I've had several hatches of what I assume are FHM, I've seen some SMB fry, bullfrog tadpoles are developing into baby frogs, tilapia are super active, a week ago my daughter caught a bunch of healthy YP that have some serious shoulders and appear to be eating quite well. I've caught SMB on a fly just before dark that appear to be quite healthy.

I've never taken a ph reading. I guess I should?

I put vertex bottom aeration in at beginning of April so I assume my O2 is OK.

Plankton blooms are good... right? Foundation of the food chain, sort of thing?

Having a 4th of July party and I know we'll have people swimming... just want to run this by the group to make sure it appears safe for swimming.

Re: What is this brown scum?
bcraley #523136 07/01/20 12:26 PM
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Sounds like you have a productive pond (fishery). Your situation appears like that many pond owners commonly have and live with. In most cases the stuff goes away during the day and often disperses with wind/wave action.
















Re: What is this brown scum?
bcraley #523146 07/01/20 11:23 PM
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bcraley,
Same thing is happening in my pond. My youngest son and I were in it today. Hope that helps!
Heppy

Re: What is this brown scum?
Heppy #523152 07/02/20 06:35 AM
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Originally Posted by Heppy
bcraley,
Same thing is happening in my pond. My youngest son and I were in it today. Hope that helps!
Heppy

maybe... showering before a swim would solve the problem grin

Last edited by Journeyman; 07/02/20 06:36 AM.
1 member likes this: Heppy

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