I have had neon tetras in the past but one had NTD which spread to the other tetras. Anyways, someone reccomended ember tetras but I have two questions with them, is there such thing as ETD? ;-) And they are smaller right? So wouldn't it be more likely that they will fit in my betta's mouth? :lol: Would cardinal tetras be better? I don't know, but I really want a small schooling fish to put in my new 10 gallon tank!