Dimitrios L. at 01.03.2021: Quality packaging the bags are very strong. The gravel is quite clean, it needs a rinse, but you can lay it immediately if you want. It's not that sharp, it hasn't got edges, nice feeling to the hand, so it might be good for bottom feeders (I don't have any). The color isn't black, its more of a very dark brown. I liked a lot, very satisfying!