Chevron down icon Chevron down icon Zoom icon Click to expand Tap to zoom Aquatic Substrate Sale $6.99 | / Clay - $6.99 Clay Color Chevron down icon Availability: translation missing: en.general.icons.icon_check_circle icon Only 3 left! 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Fine particulate gravel used to help root and nourish aquatic plants.