I want to use Eco-complete for plants, but I would also like to use black sand. I have heard that after awhile the gravel will work its way up to the top or sand will work its way down.
So, I am putting a 1 1/2" or so layer of Eco-complete and then a some plastic craft sheets with small 1/8" squares over the Eco-complete. Next, I am going to put 1 1/2" to 2" layer of Tahitian Moon black sand.
Do you think this will keep the gravel from going to the surface and still let the plants grow roots well?


