In my Plaudarium, how do i make the land and water parts?? without them mixing?

Question

Ok so i have this plaudarium or terrarium or vivarium whatever its called!! lol

and i want a water part and a land part, so how do i make sure the soil doesnt mix with the water??

Answer 1

silicone a strip of Plexiglass or glass  across the center or however you want your land water devision to be, high enough to barely keep in the substrate. seal well, let it cure for a week.