First, may I welcome you to Tropical Fish Keeping forum.
The 2-leaf plant in front of the castle is presumably the one you can't identify; it is a crypt, probably Cryptocoryne wendtii, though I usually get the "w" crypts mixed up.
To the issues. What is the temperature of the water? Egeria densa
, or sometimes called Anacharis
, prefers cooler water so it does best without heated water, i.e., room temp.
The Java Fern
looks pretty good in the photo; black areas usually mean ammonium (ammonia) or nitrogen deficiency; I had the same on mine when it was in an amphibian tank with no fish (one source of ammonia=ammonium, the other is bacteria). It may be getting too much light in balance, this is a shade loving plant.
Banana plants are not easy to maintain; they seldom last more than a year under even good conditions. Nutrients may be an issue with this plant too.
Given the setup, I would suggest a different bulb in the light. I have tried warm white over a tank and the plants clearly did not respond well as they do under cool white or daylight. A compact fluorescent bulb of 10 watts in a daylight with a Kelvin rating around 6500K would I am sure work better. That plus the Flourish Comprehensive should help the Java Fern
and Egeria, and be fine for the crypt. The Banana Plant I doubt; you may want to consider something else. If you could find a Pygmy chain sword
plant, that would probably do well.
We have profiles here, second tab from the left in the blue bar across the top of the screen, and there are some of these plants included. You can also click on the shade name in posts to see that profile for fish or plants.