My girlfriend and I have a 29 gallon tank with a couple Gourami's in with some other fish. The other day I noticed one Gourami swimming weird but I shrugged it off thinking it was just enjoying swimming. But I have been watching it do the same thing for about a week now. It swims sideways and upside down like it doesn't have much control over where it goes. It will swim by the pump and get caught in the current and go with it for a second until he can get control. His fins, antennas, and scales look fine and I don't see any bulge in his body that might point to an infection. Any thoughts? Here are a couple pictures. Not the best quality but it will do: