Quick question. I want to build a stand for a 135g tank, any recommendations? I went to my local home depot, and they have douglass-fir. I don't know anything to do with lumber, so I wanted to know if this will be fine, as long as I check them to make sure they are true and not bowed/warped. Is this type of wood fine? Seems like a general purpose do it kind of wood, and I really don't want to have 135g of water on my floor.