Eco-Coral© artificial coral is designed for simple assembly whilst permitting complex structures to be built.
The Wall units may be stacked vertically or laid at right angles. When set 1 meter apart a structure 2.4 m x 2.4 m may be created.
Up to 4 units of Eco-Coral© artificial coral may be fitted on each piece of Wall in the top recess.

The images below are from CAD drawings showing this assembly capability.
Reef designs are done in CAD and distributors have access to the originals for design purposes.