Here are a couple of pics of the 'things' growing in my tank. I have not found anything similar in any algae or fungus pics posted online. Closest would be back beard algae, but this stuff is not as fuzzy, only grown on one piece of driftwood, is both black and white, and easy to remove with a gentle brushing. It's growing in an established 115 gallon tank. There is no other visible algae except for minor green spot on the glass and rocks.