If that's the look you're going for, I'd use pool filter sand. Find you closest pool supply store and buy it from them. The most common national chain is Leslie's. Pool filter sand is light colored, uniform in grain size (and larger sand granules, too) and is very clean so little rinsing is needed. I've had it in my 55 gallon for over ten years now and I love it. Plants are growing great in it, too, though I do have to use root tabs since it is inert. But the plants don't seem to care. And neither do the fish.