Festae and JDs grow too big. A 55 gallon is only suitable for 1 JD, not a pair. And its jsut ridiculous for a festae pair, its not even suitable for one of them. Go with smaller cichlids, nothing exceeding 6 inches.
disagree! 1 JD in a 55 g tank, i rather not keep fish. 2 festae or 2-4 JD should be fine in there, unless they reach maximum size, which takes many years to achieve.