ID on grass-like plant and type of Java fern

[Melcaara]

I got this tank secondhand, it has this interesting grass plant and a bunch of smallish java ferns. He's had the tank for a while, so I assume the java ferns are full size (I've never actually had java ferns before )

What are they? I'm more interested in identification of the grass plant, but if it's possible to ID the cultivar of the java fern that would be awesome

 

[connorlindeman]

Thats Dwarf Sagittaria. The Java fern should not be buried. It should be tied to structure with the roots exposed. It will also get much larger if treated right.