I picked up a 125 gallon tank at an auction and then found a used stand for it on Craigslist. The stand is a store bought one, actually this exact model:
125 Gallon Aquarium Stand by Altra Furniture 243-5602096
It looks good, but when I got it home I really looked closer at it and it is made of particle board, not even plywood. I think it is a "put it together yourself" type since it has those screw plugs that tighten on pins like most cheap furniture. I know they have to engineer these things to hold the weight that they say they will. I just don't feel real comfortable with about 1000 pounds sitting perched on particleboard. Should I try to beef it up with some hidden 2 x 4's, or am I being overly cautious?