Thats pretty good but Ive found elmersaquarium can be misleading.
for example they recommend thode large communities 8 and 9 in "30 gallons or more" which is no where near the minimum for ONE of those fish.
We really do need to know tank size-anything below 90 and youll have a hell of a time getting the jag to not harass its tankmates. It can be done, but preferraly if they grow up together.
And also, cichlids will be cichlids. You may have an aggressive jag, or you may have a wimp. Never know untill you try. If its at least a 75 gallon, Id try adding maybe a 4 inch convict and see what happens. If the con is killed, no tankmates
