I've had my Goldie in a 20-gallon tank in Alpharetta while I'm at vet school in Athens. I transferred her to her 55-gallon tank here in Athens today. She's been away from here for a few months now so I just noticed this on her head. A friend/"fish expert" thinks it's fungus. What do you guys think? She was in a horribly disgusting tank when the filter decided to stop working for who knows how long. Now she's in clean water again with a working filter. It was recommended to buy aquarium salt to try which I've used in the past. I'll take all the ideas and advice I can get though! Thank you in advance 
