I wanted to redo my old five gallon hex to make it into something a little more natural and viewable. You can see the old fruity pebble substrate I had if you look at my avatar. Yeah, not pleasant. This tank was also my first attempt at a planted tank. The Wisteria grew well in it, too well, and ended up being a mass of floating plant at the top of the water. So I ended up with a crazy graveled tank with a wad of plants the fish couldn't get through to find their food and a large decoration in the center that my fish always hid behind. So now I start afresh. My materials are several packages of smooth river rocks. Most pet stores sell them. I bought three packages of large rocks at PetSmart for $3 each, and found a good-sized bag of medium/small ones (called accent rocks) at a Dollar Tree for a buck. I used GE Silicone 1 to put it all together. Here are some pictures of the beginning build.