Angels and Discus both can be susceptible to internal parasites very tiny flagellated protazoa often referred to as Hexamita...generally not a problem but can become a problem when stressed.
I have had to deal with it from time to time with Discus as well as my Angels.. more recently my Altum.
a good thing.. they respond well to prazi metro combo.. tho often I have to dose twice in 3 days.
the thing that leads me away from this, tho is.. heavy breathing.
I would first suspect the new inhabitant may have transported something into the tank.
btw, angels can go weeks without eating...if they were healthy at the start of the problem. a=bacteria issues of course have a different time frame as bacteria are capable of mutiplying at a faster rate.
I have had to deal with it from time to time with Discus as well as my Angels.. more recently my Altum.
a good thing.. they respond well to prazi metro combo.. tho often I have to dose twice in 3 days.
the thing that leads me away from this, tho is.. heavy breathing.
I would first suspect the new inhabitant may have transported something into the tank.
btw, angels can go weeks without eating...if they were healthy at the start of the problem. a=bacteria issues of course have a different time frame as bacteria are capable of mutiplying at a faster rate.