i remember seeing a video in japan... a 100g or whatever they call it over there... a 100 kilogram aquarium moved over stand and all... about 5 inches to one side... the tank survived... but they said that the earthquake was a huge shift, and then some wave action... if the "stand" was strapped down,the tank would've gone flying...
so i get what cody is saying... and i agree... i rather have it shift over and wiggle as one solid piece....