Well, I finally got my 45gal tank here, cleaned it up with some mild vinegar and water, rinsed it out a whole bunch of times and have it standing in place, empty . my first tasks are obviously to get some sand in there, water, and powerheads. Except I have no clue how much sand to buy, lol. The tank footprint is 36"x12". I'm getting aragonite sand, and probably going to buy some live sand to go with it to finish things off. But, how many lbs will cover it? 40? 80? more, less, inbetween, I have no clue. Your help and experience is awesome as always