Heading out tomorrow morning to pick up some sand for the substrate for my 35 tall brackish I'm setting up. Any tips on the cheapest/best stuff I could get at a hardware store or wal-mart? I don't care about color; black, white, or anything in between is fine. I don't mind doing the extra work of rinsing. I'd like to spend the least amount of money and get the most realistic looking sand that my critters are going to enjoy scooting around in. (I plan on stocking some gobies). As far as buffering, I guess I don't want anything that's going to change my ph. I'd rather keep that neutral until I've decided on a "final stock" and have an idea of what my fish average out to prefer.