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#539225 08/26/21 01:25 PM
Joined: Oct 2020
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D
Drago Offline OP
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D
Joined: Oct 2020
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I'm still a relatively new pond owner, dug and stocked this spring. It's been hot and dry for my location, the pond is down over a foot with no meaningful rain since mid-July. What really stinks is that within 20 miles east and south of me they have had significant rainfalls. Anyway, the fish still seem to be active and feeding fine. I do have bottom aeration and homemade fountain (used a bilge pump idea another member posted). My question is with these conditions, anything I should keep on eye on? Or check regularly?

Thanks.

Joined: Aug 2017
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J
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J
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Water temperature
If you see it creeping up, reevaluate the aeration and circulation hours.

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Drago Offline OP
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Thanks for the heads up.

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Drago Offline OP
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Something has happened to my pond in the past week. It has wavy surface scum or maybe algae but it's not green. Testing it shows Ph, nitrates, phosphates and ammonia all good. When I put it in a jar it looks clear. I've attached a couple of pictures. You can see the stuff to the right of my fountain and back by one of the diffusers. It's really only noticeable when the sun is out. Any ideas what that is?

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pond_water.jpg water_in_jar.jpg
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Lunker
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Based on the photos, it appears to be some weird anti-gravity vegetation!

Can someone flip Drago's photos? (Or does he need to flip them in an edit?)

[Linked Image from i.imgur.com</div>
<br>

<div class= Last edited by FishinRod; 09/03/21 10:11 AM.
Joined: Jun 2016
Posts: 2,344
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Flip and post...

[Linked Image]

It's AMAZING how hard it is to "see" the photo upside down!

Last edited by Quarter Acre; 09/03/21 10:49 AM.

Fish on!,
Noel
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Lunker
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Fixed it. I think?

[Linked Image from i.imgur.com</div>
<br>

</div>



</td></tr>





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<div id=
Joined: Jun 2016
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Your light surface scums look just like mine (in the beginning). I believe it starts out as a Protozoan Scum, that feeds a green algae growth, and if no rain event or good winds occur...it turns to a bacterial thing (maybe). It all stays very much at the surface throughout its lifecycle. many times a nice breeze will come or some rain and the "stuff" goes away regardless of the phase that it is in. I have difficulty believing that it is heavy nutrients related as my pond is very new and past tests have shown no nitrates/phosphates. My theory is that without any wind/rain action that my pond develops a floating layer of pollens that feed the scum. That's all my inexperienced mind can come up with.

Here is a thread that I replied to a couple years ago that has some good links to my other "scum" threads that may be of some interest to you...

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=513675

In the above link, you will find a link to a Field Guide for Scums. I'll post it here for convenience...

https://www.townofchapelhill.org/home/showdocument?id=28866

I base my assumptions on this guide. Look at page 15 for what your pond may be doing.

I still do not have a solution aside from praying for rain every few days during the hot and dry portions of the summer. I do not treat my pond with chemicals and let it run it's course.

Last edited by Quarter Acre; 09/03/21 10:50 AM.

Fish on!,
Noel
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Drago Offline OP
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Joined: Oct 2020
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Really appreciate the gravity fix and the feedback along with the links. Thanks.


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