Thank you so much!! My goal is to keep it as natural looking as possible. I have no clue about the java fern. All I can say is, low pH, 10ppm of nitrates, and a high powered light that is dimmed with electrical tape. All of my java fern are babies that grew on two tiny bundles of java fern that I got from a pet store. The adult plants died so I plucked off all the babies and just let them grow!I can't get over how cool your tank looks.. how are you keeping the java fern alive? I've killed 80% of mine.