Easy to handle, light weight

Hello There,
I took this back wall with a basin and prepared for seawater.
It is much lighter than panels made of live rock. You can easily edit the material. Then glue eg terraces or directly tuck coral offshoots, which then fused with the foam. So far I have found no harmful substances in the water.
If you want to make it quite well, can still apply a coating of coral sand with coral cement or epoxy.
See Image