30 lbs of clean and sterile Aquarium stones and Pebbles. Rocks range from size of quarter to dime in size. Slightly larger mix to give a nice texture and color to your aquarium set up. Natural beautiful stones to give your fish tank character. Stones help provide good bacteria a place to establish. Shown dry in photo. Wet in second photo. Look nice either way. Could work great for reptiles. Many contrasting colored stones. Help control nitrate and nitrite levels. Easier to clean than sand. Beautiful stones will make your fish feel comfortable. 1 to 2 lbs of stones per gallon of tank size. Free Shipping.