i've had my 20-gal. tank for almost a year, i got it free from my uncle who bought the whole set up for $20 back in the '80s. the tank is holding up great, but today, my baby cousin knocked the stand while trying to look at the fish and the whole thing rocked side to side a little. the stand looks like a piece of crap, it's made of plywood and that wood fiber laminate stuff and i'm worried about it's structural integrity. It has 2 levels of open shelves on the bottom that i use as a bookshelf. if this stand is insufficient, then how do i move my fully-cycled, populated 20-gal tank to a new stand and then move the stand to the position that the current one is in?