+1 on all the points made above.
The key to good scaping is getting the right rocks.
Try to hunt for really mini ones.
For pico, perhaps 2 -3 rocks in the middle will be sufficient.
- It does not clutter your tank
- more space to put corals. Pls note that corals comes attached on a rock most of the time. Give allowance for this.
- higher water volume
- less deadspot and can remove wavemaker.
If you rocks are too huge, try to hack it to half while maintaining the shape that you like.