Hi tear-scar,
The wood is mango wood. There are two large pieces in there although the one one right is smothered in java fern.
The area all aorund that lotus (if you can see it) if Java fern on mango wood, the orginal palnts have produced numerous palntlets attached to their leaves and it is now quite dense, although the leaves havent grown very long (maybe the light?).
Further right is the comon Hygro Polysperma, kept well trimed, constant pinching helps to keep it compact.
At the back of the Hygro is Ambulia (sessiliflora).
It is Sagataria natans (dwarf sag) in the foreground. There is also some lilieopsis, but doesnt grow so well.
Having a bit of a blue0green algae issue, they start on the sag.
Also have Salvinnia as floating plants...very good for controlling other forms of algae when you have bright lighting.