Well, you have a need to be concerned.
This tank isn't large enough for two of the species you are trying to keep...The auratus and the johanni both need much larger tanks to keep their aggression in check.
So, whether the fish appear to be stressed or not, odds are that they are stressed.
Mbuna also are not pairing fish, and should not be housed as such. They are harem breeders. A male auratus can easily require 5-6 females...Having two will eventually result in only having one. Auratus are one of the most notoriously aggressive of the mbuna family, and I wouldn't try housing them in less than a 75G tank.
How did you cycle the tank?
What are the current water parameters on the tank?
The catfish probably developed ich from the stress of being picked on. The fact that your other fish are flashing more than normal indicates either an external parasite of some sort, or poor water quality.
We really need a lot more information.
Did you do anything to treat the ich with the catfish? (As you've found out, pictus cats aren't always a good mix with mbuna...)
I would focus on taking care of the current health issues in the tank and then I would remove the auratus and johanni and replace with more appropriate fish for your tank size. What is the footprint (dimensions) of the tank?
Are you doing any tank maintenance? What is your schedule?
Kim
This tank isn't large enough for two of the species you are trying to keep...The auratus and the johanni both need much larger tanks to keep their aggression in check.
So, whether the fish appear to be stressed or not, odds are that they are stressed.
Mbuna also are not pairing fish, and should not be housed as such. They are harem breeders. A male auratus can easily require 5-6 females...Having two will eventually result in only having one. Auratus are one of the most notoriously aggressive of the mbuna family, and I wouldn't try housing them in less than a 75G tank.
How did you cycle the tank?
What are the current water parameters on the tank?
The catfish probably developed ich from the stress of being picked on. The fact that your other fish are flashing more than normal indicates either an external parasite of some sort, or poor water quality.
We really need a lot more information.
Did you do anything to treat the ich with the catfish? (As you've found out, pictus cats aren't always a good mix with mbuna...)
I would focus on taking care of the current health issues in the tank and then I would remove the auratus and johanni and replace with more appropriate fish for your tank size. What is the footprint (dimensions) of the tank?
Are you doing any tank maintenance? What is your schedule?
Kim