Ugh...what is with you people? Do you guys have magical java moss? Java moss does not float. And by float I mean at the surface of the water. You drop some moss in the water and it will float slowly down to the bottom, sit on the substrate, and possibly get pushed around by the current, thereafter. Maybe this is what you meant, but to someone who has never had it and doesn't know any better it sounds awful misleading.
Amazon frogbit is a nice floating plant, as is watter lettuce.
now now.. no need to chalk up other people's experiences as impossible because you never did it.![]()