Today i just noticed that 3-4 of my Serpae Tetras had small white puffy spots on their bodies. They aren't tubercles, and i'm pretty sure it's Ick. What should i do. I need answer fast. Gotta help them later today. I have Prevent Ick and I was thinking about just using it on my whole 55 gallon in case all my fish were affected. Most likely they are. Is it alright if a just use the medicine while the water is being filtered normally and stuff like that? What can i do. Help!