been looking at adding some different fish to my tank (300 gal) and was thinking maybe some viejas. tank houses 3 h. temporalis, 3 jack dempseys (one large female and two rescue juvies), 1 female jag, 2 salvini, 6 small firemouth, 8 silver dollars, and a spotted raphael. the 2 rescue jack dempseys are probably going in another tank as will the firemouths and salvini. i was thinking about vieja argentae or regani, the wife likes synspillum. what do you guys think? i am also thinking about h. pearsi. is there a major personality difference in these fish? how about some comments from people who have these species.