Java Moss (Vesicularia dubyana) Native to Southeast Asia, it is commonly used in freshwater aquariums. It attaches to rocks, roots, and driftwood. Java moss does not require any special attention.
It grows well in all kinds of water conditions, and a variety of light levels. It grows best at 70 to 75° Fahrenheit (21 to 24° Celsius), but can live in temperatures of up to 85 to 90 °F (29 to 32 °C).
It makes a good foreground plant. It is also a great plant for fresh water shrimp as it provides a lot surface area for the shrimp to hang onto and forage. 
 
Purchase Size: golf ball size