a 8x6x2 = 719 gallons right? it will be 3ft but only 2ft of it will be filled. Hope my math is right. ANYWAY here is how i want to build it. (this is the outside) this is how i want the walls to hold up with the metal clamps drilled with decking nails. (inside) this is how i want to connect the 8' and 6' with corner metal clamps. Ill post pics of the wood right now. So tell me if it will hold? I hope i used enough metal to keep this thing sturdy and tight.