I am looking to build either a 7.5x3x2.5 or 9x2.5x2.5 (around 420 gallon) tank and I was just wondering if anyone who has had previous experience building plywood tanks what the approx price would be. I already have the stand and filtration materials so all i need is the tank price (plywood, liquid rubber, glass ext) Ive tried to price materials at Lowes but i do not know the exact materials to get. Thanks in advance!