What is this?

[Barry Tetra]

What is this fuzzy stuff on driftwood? This thing grow everytime I added leaf litter into the tank.

 

[Wills]

It looks like a biofilm, is the wood quite new? They can just naturally release them over time or its something coming in on the leaves and then growing on the wood.

Wills

 

[Colin_T]

algae or fungus?