Eco-Blox-Water Matrix box Pondless waterfall 27"x16x17 x2 Same Size +Free BAG
• Ideal for use in Just-A-Falls and pondless features using large boulders. • 1 Blox equals 4.4 cubic feet of space. Holds 3X more water than traditional gravel basins. 1/2" x 3/4" hole size can be used with smaller gravel.