There are leaves in both tanks! Those big brown ones in the big tank in the centre, they're getting a bit old so ill replace them with fresh ones soon. They're dried Indian Almond Leaves, come in tan, brown and pink colours but they all turn brown when water logged and breaking down. They look really natural, give a feeding ground for snails and shrimp also they release tannins to give the water that nice (IMO) tea stained look which is quite good for the fish. In the small tank there is just little torn up pieces.