I have a 55 gal. freshwater tank with 24 fish, including my powder blue gourami. The tank is roughly 77 degrees.
Yesterday, I noticed that s(he) is very lethargic and seems to retreat to tight spaces and not move very much. This morning, I noticed black patches on both sides of him/her. Right behind each eye and before the pectoral fin, there is a long black strip and a black dot behind it. There seems to be some discoloration of the bottom fin as well. I took some pictures, although it might be difficult to see.
http://www.handruin.com/link_img/gourami1.jpg
http://www.handruin.com/link_img/gourami2.jpg
All other fish are active and eating as normal and show no discoloration (including one other gourami).
Can anyone provide some advice about what this might be and how to treat it? I looked through some disease descriptions, and had a hard time matching this to anything. I'd appreciate any thoughts.
Yesterday, I noticed that s(he) is very lethargic and seems to retreat to tight spaces and not move very much. This morning, I noticed black patches on both sides of him/her. Right behind each eye and before the pectoral fin, there is a long black strip and a black dot behind it. There seems to be some discoloration of the bottom fin as well. I took some pictures, although it might be difficult to see.
http://www.handruin.com/link_img/gourami1.jpg
http://www.handruin.com/link_img/gourami2.jpg
All other fish are active and eating as normal and show no discoloration (including one other gourami).
Can anyone provide some advice about what this might be and how to treat it? I looked through some disease descriptions, and had a hard time matching this to anything. I'd appreciate any thoughts.