Does the following look like a fungal infection? I feel like my platy is a bit dark today, and upon inspection I found two white spots on his head. Water parameters: Ammonia: between 0-.25 ( I treated the tank with erythromycin 1.5 weeks ago for 2 days and I rhink I lost a few bacteria) Nitrites: 0 Nitrates: 5 (water change done yesterday PH: 7.6 Temp: 25 Water change frequency: 2x per week, 25-30% to maintain a stable pH Background: I bought 2 Bolivian Rams maybe 3 weeks ago. Both wouldn't eat, got lethargic, dark and died. I also bought some sterbai corys at the same time and lost 1 of the 6 (no symptoms). When I bought them, I put them in my main tank and treated the whole tank with API General Cure. I treated the whole tank a second time plus added erythromycin maybe 10 days but to no avail, I lost the 3 fish. I also treated 3 days with Marineland all in one remedy... But I don't recall which fish it was. I have a platy in QT as of yesterday because she was flashing quite a bit and was starting to hide (some bullying happening in the tank too). I switched treatment to Prazipro. I'm getting discouraged! I should also mention he's eating and his personality is his regular bully self.