i still think its because you only have 3 fish in there. when i brought my ornatums home, they went in a 30 gal with a bocourti and the urothalmus. they were fine. they would swim around and not act shy at all. when i moved them into the 75 they were alone. they hid and would never come out. put in the other two, and they were fine. , the 100 gal was teh same...set it up. but in two festae, hiding and wouldnt eat. put in a larger jaguar, 2 convicts and another festae,,, everything fine.
my 125 eats the best, the least skitish, no problems at all. and it has the most fish in there. 4 festae, 5 umbees, 1 jaguar, 1 green terror, 1 losellei all ranging from 3" to 10". i only start to have issues if i start taking fish out.
you could always run down to that store, try to pick up some more mayan cichlids, and if it dosnt work i will buy them off ya!