I am running 2 T5 retrofit and 4 radion pro. As for the rock I wanted to have mas much sand bed as possible so went with this design after acquiring 170 pounds of tonga branches.
How stable is that rock structure if you were to push down on either side?
I'm also wondering how you plan to service or remove those power supplies and batter backups that are mounted behind your tank if you were to need to replace or repair them? Will the tank be several inches off the wall?
I made the top rock high and have a lot of holes so I can put my nem there and the flow doesn't bother them much. My hope is the men's will stay there and act like fire and flame like a torch. That is just a hope as nem has mind of their own. Here are the nems in my old tank I plan to migrate over.