I've kept v. maculacaudas(black belts),with managuense,cintrinelum,& grammodes. I also kept v.argentea with some hatiensis but the male argentes killed the other 5 tanks mates they where only 2-3inches at the time in a 55 grow out tank. the male was later given to friend at around 9' who kept him with a pr. of 12' red pikes a 10 or so inch butterkofri & a red devil I believe female liabiatum. The funiiest yet most tragic though was I kept a 5 inch hemichromis Ssp.(jewel weren't really boken into species at thattime) with a 6 inch male convict & a pr of 5-7 inch cintrinelums. After the convict drove a 9inch wolf fish to suicide the jeweled killed the other 3 in day (well the male cintrinellum was humanely flushed). Over the years I've kept lots of cichlids. From neet.nematopus which I think are the worst for thier size fighters there are. I had a 4 inch male chase a 5 inch Geo. stiendachneri relentlessly. The neets. nema. never backed down from anyone smaller or larger. I think with the exception of much larger guapotes(due to thier mouth size) neet.nemas. can be kept with any cichlid ie.amph.,vejas,theraps.