Natural Slate Stone 1/8 to 1/4 inch Slate Gravel F26463

They are safe for use in your scenery and will not deteriorate in the weather or pet enclosures like resin does. Perfect scale for Aquascaping, these stones are easy to incorporate into your tank. They can also be grouted together in a path or walls. They can be stacked and glued to form fish caves/caverns or benches/seats and broken to create different sizes.