hi to all im new to the site. i have a blacl moor hes 5 years old and an only fis except for a phcosimous its a 20 gallon tank. last week his one eye swelled up to twicw the size. it seems to be getting worse. he is eating but im worried he is suffering. is there anything i can do for him? i feel so bad for him. his name is popeye. thanks for any help anyone can give yvonne