hi, these pictures show my goldfish. he has a number of white spots etc on the fins and head that have been present for quite a while now. more recently he has become more lethargic and erratic in his movements. whatever the issue seems not to be contagious within the fish in the tank (another telescope eye goldfish and a number of danio). I have used a number of store bought treatments e.g. melafix, ‘love fish’ healthy goldfish and have used API stress coat as another fish had an accident with some tank decor now removed) any ideas how to move forward would be appreciated. Thanks in advance.