2 each Half Size High Strength ResCube, 27x16x9.5" - Liquid Rock & Waterfall Cleaner Lava Rock tends to shred

Lava Rock tends to shred media bags

filtration capacity and other factors affect the actual max

Waterfall Spillways have a plastic grating just below the water level

5 cubic foot box

2 each Half Size High Strength ResCube, 27x16x9.5" - Liquid Rock & Waterfall Cleaner Lava Rock tends to shredThis is the half size high strength res cube. While the standard res cubes work well in backyard and light commercial applications, these heavy duty cubes can be used in high weight bearing features. Ideal for use in Just A Falls and pondless features using large Can be used under roadways, pathways, sidewalks, etc. Fewer cubes are needed due to the large size (2. 8 times larger than res cubes above) Great for retention and recycling of rain water 27"