Hello!! Iām new here but I joined because Iāve got a sick fish and I have no idea whatās wrong with him. Heās in the family tank (I donāt have any personal fish), and Iāve got mollies(2), zebrafish(3), black skirt tetras(2), Cory(1), pleco(1), and two baby mollies. Iām scared he will infect the...