I bought some Java fern for my Munba tank around a month ago. Not much growth but it looks like I have roots sprouting on the leaf tops and mid sections? Is this normal? I have 1 48inch 40w Actinic, 1 48inch 32w 6,500 superday, 1 24inch 32wat 5,000 florasun max plant growth and 1 24inch unknow. Are they doing this because of low light levels? Thanks in advance...