20 lbs of Aquarium stones and Ruby Red Rocks range from size of quarter to dime in size. Shown wet in first photo. 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. Many Shades of Red 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.