Hey guys here is my 36G bow front tank.. I want to do 2 cliffs on each side kind of like this aquascape by James findley called Altitude

I watched the videos on it
My question is, How do i build the layers of dirt on each side with out having issues with gas pockets?? I will be using MGOPM for my substrate and was thinking about just picking up some black gravel rocks from petsmart as a cap and to help out with my budget on the new tank. Any help or ideas would be great..
Here is a picture of the 36g bow front


I watched the videos on it
My question is, How do i build the layers of dirt on each side with out having issues with gas pockets?? I will be using MGOPM for my substrate and was thinking about just picking up some black gravel rocks from petsmart as a cap and to help out with my budget on the new tank. Any help or ideas would be great..
Here is a picture of the 36g bow front
