Is that a blue orchid peacock? he's not likely to do well in an all male set up. Your peacocks are quite lovely!
Do you also have some mbuna mixed in? I've not found that to work long term except for rusties, p. acei and labs.
OK, I'll give you my two cents on the hardscape - I prefer a more natural, assymetrical look. This is very symmetrical. Also, the gaps between the rocks are quite large and really don't provide much in terms of hiding places if someone goes on a tear . . . Feel free to ignore!!!