I like that I was starting to feel I need more caves in itLooks pretty good to me, and you can always fill in that top section of the tank with coral growth. . .
That said, if you are determined to add something (and don't want to rip out the current scape) I would probably start by throwing an interesting rock or arch smack dab in the middle, resting on the existing rock work. This would add height to the tank and create a cave underneath. . .
May have to move some corals and may be finicky getting it situated/balanced. . .
Are you thinking there premium rocks? I'm only worried about thinking about all the hitchkikers that could come with it, could I do a coral dip on them possibly to avoid some of the pests or would I need to?
