I would look into the direction of educating the general public & divers.
Time to wear the think hat & ponders on the best method to do the work cheap & cheerful ways.
Prevention is better then cure ... cant keep on cleaning the beach & underwater every year.
Maybe have a mid term plan ...ie 5-10 yrs & who knows it might pay off if the new generation of future divers can learn something from what been happening in the past & present.
Might even save the coral & even marine life if is taught correctly....
Minimum Impact ;D