Corydoras acting weird

[Fishyfriend09]

I bought 5 peppered corydoras catfish today and they all looked in good health when i bought them but now they all seem to be having trouble staying at the bottom of the aquarium, i checked all my parameters and they are all fine and as they should be. Could this be something to do with their swimbladder if so how come it seems to have affected them all at once?

Thanks

 

[dkpate]

What do you feed them?
You can feed boiled, de-shelled peas, which are a laxative, it might help.

 

[Lowryder]

Cories are just weird fish... I wouldnt rule out a major problem, but they are strange fish.

Here is one of mine sleeping.



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[Fishyfriend09]

After feeding them last night, which was their first feed since getting them the same day they seem to be doing fine now, they must have been quite hungry and light which made them float to the top perhaps?

Anyway all is good now, thanks for the help =)

 

[jestes]

Do you have good oxygenation in the tank? I've seen them go to the top in a poorly oxygenated tank before. Cories can actually gulp air if they need to.