Barrier?

[guidedbyechoes]

I am looking for a barrier to go between the nutrient rich yet not pleasing to the eye substrate and sand. I have digging fish which would be an issue.

 

[RadaR]

Plastic craft canvas might work.
Should create a barrier but it still contains holes for roots to penetrate.
Like this.

 

[guidedbyechoes]

Plastic craft canvas might work.
Should create a barrier but it still contains holes for roots to penetrate.
Like this.

I was thinking more along the lines of weed barrier but not in such huge amounts.

 

[RadaR]

This should work.