Possible Solution to Java Moss Death
I've been doing a little research about java moss, slow growth rates, and other assorted planted aquarium topics. I recently bought a heater and I've been keeping the temperature high. I just looked my my temperature monitor and it is approximately 84 degrees fahrenheit.
One of the problems people are saying about Java Moss and planted aquariums in general is that higher temperatures (especially those about 80 degrees Fahrenheit) make for poor plant growth. Java Moss was specifically pointed out in some forum posts as doing poorly under higher temperatures.
For now I've turned down the heater and I'm going to try to keep the aquarium at around 75-76 degrees fahrenheit. We'll see how this does in the long-term. Hopefully the Java Moss starts to come back.