My oscar keeps his side of the tank clean of debris and such
Every week i clean the tank and move the pieces of wood and small rocks around to clean everywhere
the oscar will spend hours moving everything against the glass and scooping up sand and spitting it out away from his side of the tank. Only thing he has trouble with is the 12 inch tube where the pleco hides. he spends hours trying to push it away but he just can't. when he does manage to push it a bit, i just set it back where it usually is and the fish gets mad... lol!