rock should always be on the glass so it does not shift over time
I like how it looks and agree with everyone Ells about being on the glass![]()
I love it but I would move the whole structure to the left a little bit. The right side outcrop is close to the glass. Once you place corals on it you will probably want more space in-between.
Second one, and try to bring the back right up a bit to go above the rest of the rock work.
The flat piece all the way in the back corner?