The plant in the middle is great! If it is a java fern it is a fine one and you should be happy to have it. It looks like you have it planted in the substrate though and if it is java fern it would do much better if it was tied to a piece of rock or wood. I would not bury java fern roots. It's a "cling on" plant.
Tank looks loads better with the real plants by the way!
ALASKA