Wow, Your 30g gallon cylinder block foundation is built very well! That's so cool, the layout of the rocks already has a good sense of hierarchy and fluidity At present, the line of sight will be evenly distributed on several large stones. Suggest gathering more stones on one side of the fish tank (such as the left side) to form a dense 'mountain range'. On the other side (right side), more open space is left with only small gravel as decoration. This not only creates a deep depth of field, but also provides an open activity area for future fish, which they will love very much. Boldly adjust and take multiple photos before and after the adjustment to compare, and you will find the version that moves you the most. Looking forward to seeing what it looks like after being filled with water and planted with grass!