I really love this tank.
The hardscape is impressive and has a sense of scale not may can achieve.
The stone does remind me of dragonstone even though the name suggests otherwise. Still not one of the best stones to work with being similar to dragonstone. Well done.
The planning is flawless and it only serves to highlight even more how well planned this composition really was.
I can understand the half filled idea suggested aroung here, it would look great, i have thought about trying a half full tank before and find the idea very attractive and realistic if well executed.
But either way this is one impressive aquascape.
Small fish will definitely give it the sense of scale, but i don't thing you could ruin this scape no matter what fish, it's just so well made.