I know they like to swallow air sometimes, but one of my remaining 2 albino corydoras keep swallowing air gulp after gulp and maybe move only halfway down the tank before going back up for air. These two I've had for at least 2 years now, and recently one of their buddies "wasted away" and died for no apparent reason. The other albino corydora doesn't do the air thing as much as the first one, it acts normal some of the time. There is another, younger (less than a year old) bronze corydora in the tank that does none of this stuff at all. The rest of the fish in the tank (neons, otos, cichlid) are acting normal so I don't think it's a water quality thing.
Here's a video of them doing the thing: Link
I just did a water change in the video so the water is a little murky, but it does this all the time even if I'm not changing the water. It's been going on for a while. Have you seen anything like this before? What might it be?
Here's a video of them doing the thing: Link
I just did a water change in the video so the water is a little murky, but it does this all the time even if I'm not changing the water. It's been going on for a while. Have you seen anything like this before? What might it be?