BettaFishMommy
finkids make me happy :-)
HANGIN over the edge of a stand is a bad idea get some plywood and lay it on top of the stand so its long enough to make up overhang issue.
for as large a tank as the OP has, i wouldn't take chances with plywood being used to extend the stand's surface area.
get a good solid metal or wood stand for that tank. you don't want a lake in your living room!