oh I like the shapes in the middle, would make an awesome little zoa tank with rock rubble in the bottom. or GSP covering the hills with a couple shrimp in it looking like theyre playing in a field of grass. but you would have hell trying to have enough surface area for bacteria. luckily with weekly water changes and such low bioload bacteria isn't as important. you swap out all the water every week which means organics don't really have the chance to rot. not to mention you only feed it once a week, normally a few hours before you do the water change.