Join Date: Feb 2011
Location: Middle of No Where!
Some fertilizer like Floursh Comprehensive will do fine. Also might want to be some root tablets in there and the Dwarf Sagittaria will be fine.
Your question about the Java Fern and the baby plant. This is how Java ferns spread. They grow baby plants on the end of the leaves. They will eventually fall off or you can pull the off and plant them once they have enough roots and leaves of their own to survive.