Hi all. I have acquired 3 4ft x 1ft x 1ft tanks and I want to build a 3 tier stand for them in my fish room. My question is if I bolt 2 2x4`s together for the back and the same for the front ,and fix these to 4x2 uprights at the ends with a brace under them from front to back, will this be enough to support the full length of the tank? I don't want to have intermediate supports obscuring the lower 2 tanks. many thanks.