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#510098 - 08/10/19 07:50 PM .25 ppm Ammonia, concern?
Clay N' Pray Offline


Registered: 12/03/17
Posts: 252
Loc: Caswell co NC
.5 acre, 7.7ph farm pond.
Heavily stocked with CC, LMB & HBG.
I feed daily and have aeration 8hrs a day.
Is .25 ppm Ammonia a concern?

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#510108 - 08/11/19 08:14 AM Re: .25 ppm Ammonia, concern? [Re: Clay N' Pray]
Quarter Acre Offline


Registered: 06/10/16
Posts: 1423
Loc: West Central Missouri
According to...

http://pondplace.com/testingresults-idealranges.aspx

0.25 ppm is on the high end of acceptable.

I'm way too new to pond chemistry, but my first thought is to cut back some on feeding and consider removing some fish. If nothing else, keep an eye on it. A good rain with some flow through could help.
_________________________
Fish on!,
Noel

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#510116 - 08/11/19 12:19 PM Re: .25 ppm Ammonia, concern? [Re: Clay N' Pray]
Clay N' Pray Offline


Registered: 12/03/17
Posts: 252
Loc: Caswell co NC
Thanks for the link QA.
The "perfect storm" has occured in my BOW.
All the following have contributed to the ammonia buildup.

- Little to no rain in over a month.
- PH is at a record high. (7.6 +/-)
- feeding heavier than ever before
- high temps
- high biomass

I (incorrectly) thought that aeration helped with ammonia buildup.
The pond has always struggled with low PH due to excessive watershed, but this drought has allowed it to "percolate".
Definitely a learning moment for me.

My first clue was lethargic acting fish.
Just to pass along my newfound knowledge, ponds with low PH rarely have ammonia buildup issues. This is probably why I have never had this problem before.

On a positive note, I'm seeing what I *suspect* is a slight alge bloom. This will be the first time in 15 years this BOW has had anything close to a bloom. The low PH, combined with turbid water have never allowed it to be what I would call fertile.

I am crossing my fingers for rain.
Crazy that I would add thousands of lbs of ag lime to raise the PH...Then when it gets
To the ideal level, I want to lower it again!


Edited by Clay N' Pray (08/11/19 12:40 PM)

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#510117 - 08/11/19 12:46 PM Re: .25 ppm Ammonia, concern? [Re: Clay N' Pray]
snrub Offline


Registered: 10/05/13
Posts: 5468
Loc: SE Kansas
Why do you think aeration does not help with ammonia buildup?
I would think the more the water is exposed to the surface the more ammonia gas would dissipate. I would think running the pump more hours would help.


Edited by snrub (08/11/19 12:46 PM)
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#510118 - 08/11/19 12:50 PM Re: .25 ppm Ammonia, concern? [Re: snrub]
Clay N' Pray Offline


Registered: 12/03/17
Posts: 252
Loc: Caswell co NC
Originally Posted By: snrub
Why do you think aeration does not help with ammonia buildup?
I would think the more the water is exposed to the surface the more ammonia gas would dissipate. I would think running the pump more hours would help.


All the aquaculture studies I've read says aeration has zero effect on ammonia and may actually make it worse.

ETA, found it.
See below.

Increase Aeration
"The toxic form of ammonia (NH3) is a dissolved gas, so some producers believe pond aeration is one way to get rid of ammonia because it accelerates the diffusion of ammonia gas from pond water to the air. However, research has demonstrated that aeration is ineffective at reducing ammonia concentration because the volume of water affected by aerators is quite small in comparison with the total pond volume and because the concentration of ammonia gas in water is typically fairly low (especially in the morning). Intensive aeration may actually increase ammonia concentration because it suspends pond sediments."

Scroll to the bottom to see the section titled "Managing ammonia"
https://thefishsite.com/articles/managing-ammonia-in-fish-ponds



Edited by Clay N' Pray (08/11/19 01:01 PM)

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#510121 - 08/11/19 01:41 PM Re: .25 ppm Ammonia, concern? [Re: Clay N' Pray]
Joey Quarry Offline


Registered: 11/04/17
Posts: 143
Loc: Wisconsin
Any time you have measurable concentrations of ammonia in your water, is a concern. Will it kill your fish? Most likely, No. NH3 is pH and temperature dependent and your test only shows, one time when you tested the water, there was some ammonia.

Dumping "thousands of pounds" of lime in your BOW unlocked previously unavailable phosphorous, leading to a bloom. It suggests your pond bottom is acidic. Just a guess...

While it is true aeration is not much help in controlling ammonia, maintaining DO levels while you have a boom and bust cycle of phyto/algae bloom, is definitely helpful.
_________________________
2.5 acres, 87' Deep, Previously a Quarry

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