Soil around

The worst, however, is not a large artificial reservoir in diameter can be made from an ordinary barrel, which must be dug into the ground. The surface of the soil around such a reservoir can be decorated with tiles, and at the bottom of such a reservoir a layer of up to 30 centimeters is laid out the soil, and a layer of sand on it, then a thin layer of gravel. In this case, the outer side of the barrel must be covered with bitumen, and the surface inside with oil paint, it can be black, it will visually increase the depth of the reservoir.