What happens when the corals grow larger and the glass breaks under the pressure? There have been others to try this method only to abandon it a few years later once they start seeing the broken glass damaging marine life 😭. Plus even though it “not much” the cement will not allow most species to adhere to it as it’s toxic for the corals, and the only people that win with use of concrete is its manufacturer, whose primary function is truly the destruction of the planet. Food for thought. We’re just with the belief that this is a short … Continue reading Glass bottles as substrate?