[SpeedEuphoria]

I have some Mopani Driftwood from Foster&Smith as well, in my 10g tank that I just set up. I have something growing off of it similar to what you have, just not as bad. On parts, it looks clear stringy like that, and on others, covers the drift wood like a web.

You need to boil driftwood when you get it to kill whatever may be living on it.