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Discussion Starter #1
My fish seem to be gasping at the surface. But not all the time. Their gill movement isn't labored. Their activity and appetite is normal. There's no ammonia. No nitrite. Less than 5 nitrate. And nearly the entire tank is planted. I do have a co2 generator. But the generator is sized for a 20-40 gallon. So the co2 output is very minimal. My water is soft. Ph is between 7.0-7.5
 

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are they doing it all the time or only at certain times?
 

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If it is of an evening ,or first thing in the morning,that the fish are seen gasping at the surface,then CO2 might need to be dialed back a little,or airstone used at night ,when CO2 is plenty and O2(oxygen) is perhap's too low.
Would not run airstone during the day, least you drive off the CO2 that plant's are using at this time.
 

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Discussion Starter #4
They aren't gasping all the time. Just randomly. And they hardly hover near the surface either. With the gouramis, I see most it after they chase one another. The angels are the most random with the gasping. I can't seem to pin point what may cause it for them. They all(including the gouramis) do their thing; grazing, swimming, chilling out, exploring, chasing....and if they happen to end up at the surface, they'll gasp at the surface for what appears to be about 3-4 breaths and then they continue on like nothing ever happened.
 

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They aren't gasping all the time. Just randomly. And they hardly hover near the surface either. With the gouramis, I see most it after they chase one another. The angels are the most random with the gasping. I can't seem to pin point what may cause it for them. They all(including the gouramis) do their thing; grazing, swimming, chilling out, exploring, chasing....and if they happen to end up at the surface, they'll gasp at the surface for what appears to be about 3-4 breaths and then they continue on like nothing ever happened.

I'm confused.
First sentence in your original post.."My fish are gasping at the surface" This is sentence that led me to suspect Too much CO2,not enough O2.
If this is the case,,it is normally seen at night after light's out when plant's quit taking in CO2 and when same plant's begin using up available O2 (oxygen).
 

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gasping is done at the water's surface, no?
Well,later in your thread you say they hardly ever hover near the surface.
Either they is,or they ain't.??
If water parameter's are in order,no ammonia,no nitrites,then as mentioned,,maybe CO2 need's to be adjusted back a little. Maybe run airstone at night (on a timer).
Running one during the day ,would work against keeping the gas (CO2) in the tank for plant's benefit.
 

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Or maybe they dislike the co2 system on a whole. :dunno:
Really doesn't sound extremely serious whatever the problem is..especially the guaramis. They can breath air from time to time and thats normal especially if worked up by chasing. The Angels however I've never seen mine do that(unless they think they see food or think I'm about to put food in the tank) . Maybe everything you're testing for is normal but something else is the problem which honestly leads me to believe the co2.
 

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Discussion Starter #9
1077 im not sure how you aren't understanding
They aren't gasping all the time
They gasp at random times
They're behavior and appetite are normal
They do their thing. Swim. Graze. Chase. Explore, etc. If they happen to end up at the surface they'll gasp for what seems to be a few breaths and then continue on lioe nothing happened.


Anyways, I added a coupla stones to use at night.
 
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