30 lbs Aquarium random pebble and small stone . For substrate's create a healthy fish environment. Promotes healthy bacteria to maintain proper nitrate/nitrite levels in your aquarium water. Multi colored pebbles stones. First photo shows them wet 2nd photo shows them dry. Very nice value for the price. Rocks come clean and sterilized parasite free before shipping. About size of a dime 1/2 inch . 1 pound per gallon of tank size. NOTE Rerinse your stones with water to remove dust caused from grinding stones during shipping. I can accommodate any sized order. Please send message if you need a custom order. Must Pre Rinse stones untill water is Clear after shipping and Handleing to remove dust.  Free shipping!