Is this even an algae?
Can someone determine if this is an algae, and what type if it is? I've looked through many of the algae threads/FAQ sites but it doesn't seem to show this particular thing. It seems to only grow on this particular (java?) fern, and there is only one fern in this tank. The other carpeting plants, etc has some diatoms and hair algae as it is the 5th week of my new tank, but none of that thing on the fern.
Also, should I cut all the infected leaves to prevent spread?