My java moss grows like a weed. Many other things die on me, but java moss is one tough cookie to kill! Ever since I got a better light, and am at about 3.7 wpg, the java moss and a crypt sp have really taken off. I could easily see java moss overgrowing a ten gallon tank
Java moss will survive about any condition but it thrives teh best in high light/CO2 conditions. It does notreally seem to care much about other nutrients although I have heard mosses like PO4, but maybe htat jsut keeps away some of the algae. Heck, my java pearls in a 10gallon with 30wattws NO and 30ppm Co2.