I just got a new school of neon tetras to replace one that had been wiped out by improper ich treatment.
I discovered last night that one of them has some kind of fungus. It's a small white slightly furry patch on one side of his body at the base and just below the dorsal fin.
What's the best way to treat this? I've seen some advice saying methylene blue and some saying antibiotics. Not sure what to get.
I've already isolated the fish, but are fungi like these usually contagious, or are the rest of my fish probably safe?
10 gallon, cycled, filtered (aquaclear 20), heated to 78 degrees. Water parameters all test normal (pH between 7.4-7.6 normally). I have 2 sunburst mollies in with the neons. Gravel substrate, live plants, small airstone. Fed tropical flake food and brine shrimp 1 x daily. 25% water changes 2 x week.
I think that covers it. Please let me know what to do, i've not dealt with any type of fungus before. I'm torn between spending the money to treat it or taking it back to the pet store as i've only had it about a week, but I'm sure they'll euthanize it if I take it back.