Thanks for the compliment. It's not actually duckweed..at least I don't think. It's bigger than duckweed..it's called red root floater, and it's easy to take out as it multiplies. I just put it there as something to get it going. There is another floater too, it's rare..or sort of. It's a little carnivorous plant called Aldrovanda vesiculosa, or waterwheel plant. I added a 'red children' lotus yesterday. Eventually it will most likely take over the container.
