I really like your rock structure! Im always trying to think of new ways to build caverns and things that my fish and inverts can hide in.... It VERY time consuming!
How did you get your rock to stay stacked? Make sure its reinforced somehow or you chance an avalanche!
What are you going to put in the tank? Any ideas on corals/Fish/inverts?
How long has the tank been up? Looks like you found some very nice peices of rock there!
Good Luck,
Jessica/Shrimpi