Search results for query: *

I will post a picture later today (at work currently). It will be better than me trying to describe it with my bad english. :D I do know about these black spots/spores on the underside of the plants as describe in your link. I have it on the two other varieties of Microsorum pteropus...

What could be the cause this ? It appeared on older leaves. Photos can be posted if needed. Can the black mark be reversed? ( turn back green ). Plants looks/seems healthy ( growing new leaf) FYI, Misc' known informations: - non-CO2 10gallons US tank lite with 15watt 8 hours a day - filtration...