I'm about to upgrade to a 180-gallon tank and of course now I have to make the decision glass or acrylic. I think if I lived anywhere else in the country I would easily go with the less expensive and harder to scratch glass. But the fact is we live in So Cal and we have earthquakes. If we had a 7.0 or so I am assuming the acrylic would have a better chance than glass. What do you guys think and what do you have? Thanks.