My snowflake eel hasn't eaten for three weeks, and I am getting worried. He lives by himself in a 75 gallon FOWLR tank. Other than nitrates being at 40 ppm, the water parameters are good. I've had the eel for nearly six years, and he has gone through periods of not eating before, but never as long as three weeks. I normally feed him squid, silversides, and clams.
He has a small black dent in the left side of his face that wasn't there before. Also, he's had a some discoloration (possibly an injury?) on his back for at least two months. It didn't affect his eating previously, but is it an issue? Should I try treating with Melafix or another medication?
He has a small black dent in the left side of his face that wasn't there before. Also, he's had a some discoloration (possibly an injury?) on his back for at least two months. It didn't affect his eating previously, but is it an issue? Should I try treating with Melafix or another medication?

