Parrot with large white patches

I have two Parrots that are about 6 years old they have been in the same tank for that period of time with various other Cichlids.  A few weeks ago I found one of the Parrots laying on the bottom of the tank the other swimming (no problem) I moved the sick one to a hospital tank it had changed color from orange to almost white.  I added another bubbler into the tank and after 24 hrs it seemed to be doing much better.  It's color seemed to be with some orange but white patches had formed on it's body.  The next few days the other Parrot was turning white

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