I haven't been able to see his poo but my other fish seem normal. Not white or stringy, nothing moving in it. The gourami's cheeks are still red though. Maybe they have always been this way. How long could he live if it was some infection?
I'm not sure if it's swim bladder disease. He only has trouble swimming if he crashes into things a lot.
Would Pimafix work if he had any kind of bacterial infection?