I've only ever used peroxide for algae, wondering why it's not on the list? It is definitely a chemical solution. It doesn't fix the underlying problem, but as far as I can tell it's basically impossible to starve out bryopsis - I successfully used peroxide to kill it one patch at a time.
I had enough of it at one point that I think I was inadvertently doing peroxide dosing, by hitting multiple patches of bryopsis a day.
I had enough of it at one point that I think I was inadvertently doing peroxide dosing, by hitting multiple patches of bryopsis a day.