Black Diamond Cichlid Reoccuring Fin Rot
1 year old female Black Diamond Cichlid aka Polleni
55 gallon African Cichlid tank
water parameters are normal and healthy
This fish is very important to me and I'm concerned. I first noticed ~6-8 weeks ago that the tail and right fin was frayed and rotting away. All of my other fish are doing great, and my water parameters are on point. I promptly treated the tank with Melafix for a week, and the Polleni quickly healed. 1 week later the fin/ tail rot started up again and I treated again for 10 days, symptoms disappeared. 5 days ago, I woke up to find his tail split and right fin AGAIN showing a reoccurence of fin rot damage. Started treatment again with Melafix, tail and fin healed over the past few days, but this morning the dorsal fin is starting to show signs despite ongoing treatment.
I am started to believe that this is a secondary symptom of a more serious bacterial infection. But the fish is eating and acting normal and I really can't find any other symptoms other than the abnormal reoccuring fin/tail rot to diagnose an illness. I am concerned and think it may be time to use antibiotics. She is very important to me. I do not have a hospital tank. Can anyone advise the best drug and method for treating this fish?