Duke had bee spending a lot of time at the top behind the filter. Two days ago I noticed a buldge that has grown on his ventral abdomen area tword the rear. It is pretty medial, but just next to his ventral fin. Then last night I noticed his left eye all bulby. Yesterday I put some aquarisol...
It's like he has a weight on his tail draging him down. He'll make it up for a quick bite and then sink back down. His back half seems thin and wasted like he can't use it to help him swim. He's trying to make it by only using his front fins. What should I do?