I would just try and discourage the goby from burrowing in that area first if you're happy with where the favia is. Don't know how big your tank is, but some rock placement or something in that area may help.
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Mike
150g reef, 55g sump, T5's, Vertech 200A, Profilux III - German made is highly over rated, should just say Gerpan made.
Reefkeeper - individual obsessed with placing disturbing amounts of electricity and seawater in close proximity for the purpose of maintaining live coral reef organisms.
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