Thank you Atena. I bought it from aquariumplants.com as Riccia Fluitans but it doesn't really look like it from the pictures I see of it online. I think it is really duckweed. Most of the leaves are small but some that are in one of my tanks are larger, about 2 or 3 times bigger. I really like it, and it grows extremely fast. It will take over the surface of the tank really fast...it's in all my tanks. At one point it all died out in one tank, but I managed to salvage a small bunch about an inch in diameter. It took over the tank and 2 other tanks in about 2 months.
I just came back from the petstore I didn't find the decoration I was looking for but I decided to add some more light for the java moss at the back since I didn't want to change the design of the tank I found this it is actually a bubble maker with light so I removed the buble thing those are pics with both and with the new light only what do you think?