Swim Baldder problem.

Hello

I have got an orando that looks healthy. but when it is swimming and it
stops. It floats to the top of the tank. I have been told this is a swim
bladder problem and that this is because of surface eating. I have changed
the food to a none floating food. but the fish seams to be getting worse as
it is know floating on its side, but when swimming looks all ok. How do I
course the problem and am I correct in thinking that it is ok to keep the
fish in the same tank as normal?

any help will be very Appreciated .

regards magpieally.