they breed really easy I hear and they can be kept with anything that they cant fit in their mouth and wont beat them up (they wont rally defend themselves,I had a jewel cichlid take one of mine out).They can be kept in almost any water conditions,soft (amazon) hard (rift lake) or even brakish.Ive kept 3 and had no aggression problems at all.they get like 5-7"
The icing on the cake for me with these guys was their eyes...puffer got nothing on these guys as far as the sheen/glaze they have over their eyes,and these guys have different colors in their "glaze" too,not just green.
I really want to get some more but my lfs never got them in again after that one time.