My red tail shark started to get white spots. This is my first time running into any disease with my fish. I was thinking it was ich last night but now I’m not sure if it’s “fluffy” like a fungal disease. I set up a quarantine tank with water from the main tank. I’m attaching a photo to see if anyone with more experience can distinguish which it is. Also none of my rainbow fish have any white spots right now, only the red tail is looking very bad.