I recently noticed that in my 125 l aquarium that two bottom dweller species (corydoras sterbai and crossochelius siamensis) went along pretty well, and also with the other species of fish (rasbora, barbus, danio..), and so I was thinking in making a way larger aquarium someday. I thought it would be cool making a sort of aquascaping: in the very sides of the tank making very planted zones (something like the rainforest) and as we go to the center plants gradually disappear formign something like a desert. The species I've chosen are the following: Corydoras sterbai and trilineatus, Platy fish, Swordtail fish, zebra pleco, cherry barb and five band barb, danio margaritatus, zebra and spotted, crossochelòius siamensis and several species of tetra. Also I thought adding a great bunch of cherry shrimp and nerite snails even before adding the fish. Regarding the plants, I still don't know if some red-painted species would not necessarly require a substrate to survive. How big the tank must be? Like 500 liters or so? What other things you want to suggest?