The Puffer Forum

Please help. I have a grey goby dragon in a 55gal tank with other freshwater fish who look and act very healthy. My goby is eating very well and behaving well. But, he has these white markings on his body that worries me. I was told it was a fungus...so I have treated the tank with Pimafix then Lifeguard and the markings are spreading. I thought it was his hiding place (castle) that was creating scrapes on his body. All the fish are friendly...no bullies. Ive had the water tested and all is well there...I want to set him up in a 10gal hospital tank...I have it set with few exception of how much salt in the tank. I would like to treat him now alone as everyone else in the 55gal tank is fine. Maybe separating him will help him. I was told to try Melafix...any suggestions?

If you have him in fresh water then that is most likely the problem especially if he has wounded himself on the decor, he needs to be in brackish water.

You also don't list your water parameters, also is he eating well?

Please answer all of the questions in red above. As the other poster stated if what you have is a violet goby (they are actually grey) it needs to be in brackish. It will have a very short lifespan in fresh.