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Cory catfish keeps swimming to surface and is running like crazy

RainGamma

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He just started to do this. He stopped but I’m wondering why. I’m going to send a video of it I just got him. I have two right now but going to get more. It’s a 20 gallon long and it’s fully cycled
 
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RainGamma

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image.jpg Don’t worry I’m changing the gravel to sand
 
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RainGamma

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Also how much of Cory Julli should I get for my 20 gallon long?
 

Colin_T

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Corydoras regularly take air in from the surface to breath and help their buoyancy.

If the fish is doing it regularly (several times a minute) there could be a water quality problem or low oxygen levels in the water. Check the ammonia, nitrite, nitrate and pH of the water. Increase aeration/ surface turbulence and see how they go.

All Corydoras do best in groups of at least 6 or more of their own kind. I think a 20 gallon long is 2 foot long and that should be fine for 6 Cories.
 
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RainGamma

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Corydoras regularly take air in from the surface to breath and help their buoyancy.

If the fish is doing it regularly (several times a minute) there could be a water quality problem or low oxygen levels in the water. Check the ammonia, nitrite, nitrate and pH of the water. Increase aeration/ surface turbulence and see how they go.

All Corydoras do best in groups of at least 6 or more of their own kind. I think a 20 gallon long is 2 foot long and that should be fine for 6 Cories.
I’m pretty sure my water is fine. I think it’s the brown algae as people say that it steals oxygen from the fish I scrubbed most of it off but I gotta do more. I can increase my filter
 
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RainGamma

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Corydoras regularly take air in from the surface to breath and help their buoyancy.

If the fish is doing it regularly (several times a minute) there could be a water quality problem or low oxygen levels in the water. Check the ammonia, nitrite, nitrate and pH of the water. Increase aeration/ surface turbulence and see how they go.

All Corydoras do best in groups of at least 6 or more of their own kind. I think a 20 gallon long is 2 foot long and that should be fine for 6 Cories.
I can’t check the Ph right now but I will when I can. I’m going to take it to the pet store to check it out.
 
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