Aquarium is located?

I asked a question a few days ago and I have some good answers i just want to be absolutely sure of himself. I bought a stand my local pet store type and was told that would be good for my tank 29 gallons glass fish. its iron and really strong, but is only compatible with edges and 4 corners of my tank with nothing holding the bottom except at the edges and corners. i responses previously said it would be nice if a glass tank. Only need to be sure. Does anyone out there have the same kind of support in a tank of that size or bigger? please help I want to make sure that will sustain before obtaining a large amount of water in my floor.lol i only want to make sure the tank is not leaking stressed and be supported only at the edges and corners. iron is and compatible with all edges and corners, but not below it. Many thanks guys

Check out this site and you will see where I got my answer a few days (I knew I had read, but could not remember where. I hope this makes your mind! http://freshaquarium.about.com/cs/algae / bb / bybstand.htm

Marineland Deep Dimension 150 Aquarium