Check the listing for details. 15 lbs fish tank rock pebbles and small river stones. Color: Multi-Color, Condition: New. Listed at 22.07 USD. Decorative river rock for use in fish tanks and ponds. They are between 1/4 inch to just over 5/8 inch in diameter. In the photo the rocks have been washed and are shown wet. These river rocks will need to be rinsed before use in your fish tank or pond Naturally beautiful river rock to give your fish tank character. River Rock helps provide good bacteria a place to establish. Many Shades of colored stones. Helps 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.If you would like to add some larger decorative river rock on top take a look at this listing> click here 78pi85Free Shipping to all US States And Territories Free Shipping To All US States And Territories