I have helped quite a few of younger students with Science Fair projects over the years.
From my perspective, I think option one would involve a lot more explanation of what is going wrong with our reefs/oceans and the Pico would be there mainly to show what it should look like. I don't imagine you're going to change the pH or raise the temp, for instance, to demonstrate the ecological problems. The pico would more or less be a prop to attract people over but wouldn't actually demonstrate the major environmental issues threatening our oceans' reefs.
Option two would be a better demonstration of how what humans destroy, other humans can do their part to try to save. Have him explain the benefits of aquaculture, not just of corals, but also of fish so that even if wild populations are threatened by environmental problems and overfishing, we can still do our small part to help save the various species from extinction.
Just my two cents.
Anthony
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