i have a wall in my home office that that is just right for a 6x2x2 tank which i think will = 180gal. i would love to build this my self after reading through the amazing builds in the forum. i want to set it up for CA/SA . if i do build i prob will with a plywood tank? my ? is would it be cheaper to build or buy? if price is not to much of a difference i prob will build just for the glory!!!