can any one identify this issue? looks like ulcers? murray river rainbow fish eats no problem swims no problem, looks like it might be speeding on him though. red growth on pectoral fins and a bit on one side by tail. all other rainbows are fine no sine of any sickness... 50 gallon tank ph is 7.5
nitrate is good nitrite is good ammonia is good, this guy came in with the growth but looks a bit bigger now...