Pretty much like sheets of slimy black stuff, I can scrape it off if I grab the leaf and run it between my thumb and index finger. It is kinda spotty in areas, not covering the whole plant. I always do a 10-15% water change every week, once a month clean the gravel(flourite mix). The tank has pretty low light( <=2 wpg) and has some natural light that hits it partiallly during the day. Biowheel and airstones are running all the time. I use about a capful of the seachem flourish plant supplement after every water change, something that I have been doing for about 2 months or so. Temp is always around 75 to 78-have not done any water testing yet...
Sorry if I missed something important, gotta run...
Don
Ohhh wait, I have a digi cam...
Here is a pic of a leaf that I had tried to clean off already..
Thanks guys!