grovsey

what is the min of brick u can get away with if having a window in a pond ,my pond will be 10x7 and wanted to put the window in the 7ft size but its getting made and its going to be almost 4ft wide and 21'' high would i get away strength wise .im usingn7 block on its side for strength
so will have around 1 1/2 ft each side will i get away with it ???

its going to 10x7x5 aroung 6000 gal
ian