Help with sideways swimming panda cory

Gilbert

So this morning I did my fish count and check while feeding everyone, everything was fine. Now I just come home and one of my panda's is swimming sideways or just laying sideways. He's still breathing and he'll swim away when I try and net him. What could be wrong? Should I remove him from everyone else? HELP

fighttest

what are your water parameters? i.e ammonia nitrite nitrate ph
whenever you post a help request it really helps to know your water parameters and history of the tank
it would also be helpful to list the tank inhabitants

Gilbert

Everything is testing normal. He's in a 20 gallon long split with 9 other corydora's(split 5 on each side) and two bettas. Everyone else is fine.

Rohland

Sorry to say, but my cory did the same thing when he died.

1077

What is normal with regards to water parameters? Ammoniqa must be 0 nitrites must be 0 and nitrAtes should be kept at twenty with weekly water changes. People who have kept fish for sometime will ALWAYS ask for the water parameters because they tell us exactly what the fishes enviornment is like and whether the problem could be a problem of perhaps deteriorating water conditions.
With that said, I have a group of eight julii corydoras and have been caring for them for nearly two years now.One of them consistently swims at a 45degree angle and when resting, list's a little to one side. Assuming all your water parameters are in order and filtration is adequate for your tank and properly maintained, then I would simply observe the fish and maintain the water quality while providing a variety of foods. Corydoras appreciate oxygen rich water with moderate current. Make sure there is plenty of water movement and possibly add an airstone if you don't have one already in use. I would also keep in mind that cory's don't appreciate water temps much above 77 degrees for any length of time.