What a impressive creation you have there! I like how you've adhered to aquascaping principles of placing the rocks on either side of the tank as to create a two sided tank. It must've been a lot of work carrying that amount of stone into the tank by the way. And I like the contrast between the dark background and the light sand. The sum is greater than the parts. And that bonsai tree in the "valley," is the first one I've ever seen. I can tell that a lot of planning has been put in this tank. It will only get better with time as the plants grow out. I'm gonna copy that bonsai tree.