I remember seeing them for like 16 cent a piece. Didn't really pay attention to what they were called or look at them too hard. It will be Friday till I het there.scarface said:If you're thinking of rosy red feeders, those are color mutations of the Fathead Minnow. You may even see the natural ones (I actually think they look a lot nicer) in with them too.
30 in a 75 gallon should be fine. They do get relatively large, 4-5".