One of my guppies developed a white patch, looked like fungus? So I treated for fungus and a few days later the white patch peeled off, leaving a colorless scar. The fish is really lethargic, but is still eating. The other guppy and all of the other fish in the aquarium appear healthy and energetic. Any thoughts?
Water temp - 77 degrees
PH - 7.2
Ammonia - .25 (Still cycling. Performing 50% water changes daily)
Nitrite - 0
Nitrate - Do not have a test kit yet for Nitrates
Here is a photo of the Guppy. Taken about 5 minutes ago. Note the colorless scar-looking thing.