Thanks everyone.....I used untreated 4x4 posts. Not only will the stand hold 40,000 lbs but with such large flat surfaces to work with the contruction was pretty easy. The 8 inch deck screws cost a pretty penny but they are strong enough for anything! i just found simple plans to build a canopy since my tank is custom and cannot fit a glass lid....heres a pic....still about a month from up and running!










