Hi Mike
I purchased a Lineatus about 3 months ago that developed a swimming bladde disorder. It developed about 2 or 3 weeks after I had him. It was eating great and over maybe a 2 to 4 day period it showed upgreat . Based on my search, if it happens , the feedback of any success stories was none. The 2 treatment options I found were 1) treat with anti biotics both positive and negative gram treatments and / or 2 ) On Reef builders site, they showed how you can highlight the swim bladder and pierce it with a hypo dermic needle to remove the air. I actually tried both over a 2 week period, first the the medication and then needle. It survived the procedure but showed no signs off recovery , I lost the fish about a week after the procedure. I was also force feeding it at the end with a soft syringe , but had no success. Hopefully you will not have this experience. good luck