First, my setup:
I have a 37 "tall" (All-Glass #10037 37 Gallon 30"x12"x22") aquarium with an Eclipse 3 hood with a DIY 3rd light for a total of 3 x 18w = 54 watts of light. Lights are on for 14 hours. About 2 inches of substrate - 50% gravel, 50% flourite. DIY CO2 using 1 2-liter bottle and the sugar-water-and-yeast method, replenished once every 2 weeks (about when it runs out). Wood airstone for fine bubbles. Augment with 2ml Flourish Excel and 1.5ml Flourish Iron daily. Once a week 1ml Flourish. 2 20% water changes a week. I have about 10-15" of fish, and dozens of little snails (though my newly acquired dwarf puffers are rapidly reducing that number). Ph is 7.4ish, GH: 13, KH: 8, Iron: 0. I accumulate a light dusting of green algae on the front glass during a 2-3 week period.
While my Blue Hygro grows 2"+ a week, my java ferns are not diong well. The one big plant I bought made little ones on the tips of its leaves, so I attached those to rocks - I have 6 of them now. The leaves grow out, and then seem to fall apart. Any ideas?