The only reason I am doing this with clay is because I DO NOT HAVE ACCESS TO ANY GLASS! I am low on budget because I just got the aquarium so clay is my only option. All the glass shops around here sell glass for 40 dollars a piece that is 24"x19"x1/4" and there are no way I can buy that. Unless anyone know where I can get custom cut glass cheap, clay is my only option. I were going to do wood with pond liner but people tell me that the wood will rot because of the moisture. If I use coil instead of slab the container will become a lot more even. Will I be able to make it without sticking it together with silicone?