Hi. One of my guppies has developed a brown stripe down the side of its body including the dorsal fin. Assuming it was a potential bacterial infection and noticing that it wasn't moving as quickly as the others in the tank (all of which are still fine and show no signs of disease) I treated the tank with Melafix for 7 days. Although the particular fish started acting more normally there has been no change on the brown stripe. I wonder if others think this is bacterial and if so if I should continue treatment or not even through the fish it now acting normally? Any advice appreciated. I have attached a photo of the fish concerned. Thanks!!
