Just saw a video of these guys and they are very active little boogers. I have never seen these before and would love to learn on them. I read they do good in shoals of 8 or more. I have a 29 that is empty would this be too small of a tank to keep a group of 8? I also have a bunch of CA tanks fish ranging in size. Would they be good in those tanks without killing my cichlids? They are scale eaters is what I have read so would that be too many to put in a CA tank?