Hi all. I am about to set up my first 6ft, 120 gallon tank which I bought used a month or so ago. It came with a square tube, metal stand which the previous owner had used. My question is this, should I set the tank directly upon the metal stand or should I put a piece of plywood between the two. Or would it matter either way. I am going to attach a wooden frame with doors around the base later. Thanks in advance for any advice.