I am currently building a coast to coast overflow on the short side of the tank so it will only be roughly 18" wide. The weir will be 4" wide x 5" deep. Originally I was going to use 1/4" glass but in the process of building it I thought it seemed like a bit overkill for a small weir like this in a small tank. Do you think I could get away with using 1/8" glass as there won't be much pressure inside the box. Just thinking it might not stand out as much. Any thoughts would be appreciated.