im aware fryeri are haps (id be retarded to not know that by now)-i have a few and have been doing this a while.lol i also have p. acei- mine are quite large and kept in a 180 gallon-im surprised three fit in a 29 gallon tank-mine are pretty strong, active swimmers and tend to school together and swim the length of the tank-do yours school together? i have so many other fish in the 180 gallon, but my acei's only hang out with themselves.