It's not pessimism to say "this could be done better; we've seen the methods being used fail repeatedly before"
The steel is scaffolding.
There's not yet an awesome-coral restoration markdown README.md; or any mentions of both "MARRS" and "Reef Cubes".
Do coral prefer steel to other materials like concrete, sargassumcrete, hempcrete, sugarcrete, formed CO2, or IDK cellulose; and can you just add iron to the mix or what do coral prefer?
Can RUVs and robots deploy coral scaffolding safely at scale underwater?
What other shapes would solve?
> Researchers have turned the red mud waste from aluminum production into green steel
Perhaps green steel for steel coral reef scaffolding