Because live rock has hitch hikers like Majano Anemones, Aiptasia Anemones, Mantis shrimp, pistol shrimp. Coral eating Nudibranchs, sea spiders, Asterina starfish, unwanted algae and more. My tank has been pest free since day one. Dry rock is cheaper too. You could go with Real Reef Solutions rock, it's just expensive. https://www.saltwateraquarium.com/r...K0MkWCiSV0dNO1lOdLNGI3YTdXSfw9JQaAs8BEALw_wcB
Do you have any input on the Great Barrier Reef and Australian rock specifically?It's best to buy dry rock and cure it. Use Reefbright Live Rock Enhance. That way you know for sure you don't introduce harmful pests to your tank. It's 2.99/lb at BRS. https://www.bulkreefsupply.com/brs-reef-saver-dry-aquarium-live-rock.html
Again, I don’t know too much about the specifics of the Great Barrier Reef, but perhaps it’s also important to focus on ocean acidification, in addition to bleaching, and it’s impact on the integrity and productivity of the reef-building corals, the rock they form, and the shell-building hitchhikers and calcareous macroalgae that inhabit the rock.