Another trick is you do not want the rock middle of the tank is to just mount the lights further back if doing a rock wall on back glass or angle them to face back towards it a little when mounting.It does have center braces, which is why I wanted the hydras. I have a ton of rock to work with I may just try and get the aquascape perfect for the hydras.
I have tons of fish and needed hiding spots, so beneath the macro field are a ton of rocks just put there to provide hiding spaces for them.