have you got any more fish?
my friend had silver dollars with the same problem you have with the corys. I think it could be ammonia poisoning.
I would go and do a 50% water change in the main tank.
Bless Him. R.I.P.
Are you sure its not whitespot but velvet.
Yellow patches can be anything from velvet, columnaris. Yellow sheen on the blue area can be ntd. But usually the red stripe area bleaches out first with ntd.
how are the fish now?
what temperature are you keeping your peppered cory(s) at? They should be kept at 18-20°C and no higher than 23°C
what temperature are you keeping your peppered cory(s) at? They should be kept at 18-20°C and no higher than 23°C
Well atm the main tank is at 30°C for white spot treatment A good water temperature can range from 70 to 78 degrees Fahrenheit which is about 22 -27°C, usually i keep my tank at about 25°C. I got this information from here on the fish species place peppered corys