More bad luck

Today when i turned on the aquarium light I noticed that Klaus "the angry oscar" has developed some sort of light white spot on the top of his head. I don't know what it is as of yet, but i will venture to guess that it is a mold.  If anyone happens to read this blog, and knows what it might be please comment.

Sally got fin rot: Update 2
She is still alive which is good
Not out of the woods yet still have
4 more days of treatment.