Estes Nature Blends Pebbles is a high-quality non-toxic pebble blend designed specifically for basic freshwater tanks. Great for brightening up aquarium interiors as well as weighing down plants and decorations. All Estes products are clear coated, using 100% environmentally friendly high gloss resin. This state of the art process makes their pebbles virtually dust free, and provides the best possible appearance and ease of use in your aquarium. Contains 25 lb of Deep River colored pebbles.