Utilize a Permeable Fabric Membrane

What happens here

The primary solution to prevent gravel from clogging with soil is to install a fabric membrane. The speaker emphasizes that 'clean drainstone' must be kept entirely free of any foreign matter, including soil, vermin, or other debris, to function solely for transporting water. He illustrates the concept by explaining that just as stepping on a rock in dirt creates 'mud rock,' direct contact between soil and gravel results in contamination. Therefore, a permeable fabric membrane serves as a physical barrier that allows water to pass through but blocks soil particles from mixing with the gravel, maintaining its clean and efficient drainage properties.

Goal: Implement a fabric membrane to physically separate gravel from soil.