I am toying with the idea of makeing a 12" cube. What thickness of glass should I use. Is there better glass then others? I would most likely buy from Home depot or lowes. What type of silcone should I use.
I don't know much about glass, but I do know you should use
aquarium grade silicone sealant used for construction of aquariums.
The other stuff has chemicals in it harmful to our "critters".
I would suggest acrylic. It bonds better and is easier to work with. For a tank that small It would be rather inexpensive to make one and you can make custom sizes too cause its easy to drill.