Help! White Stringy Stuff Leaching From Driftwood!?

Not a beginner but I need help IDing this stuff. I've never seen it before. I just did my regular 30% weekly waterchange, and I have NEVER seen this happen before.

A piece of driftwood I have had for about a year in my tank after the waterchange just started rapidly leaching ths white stringy stuff. Parameters are all pretty normal for a planted tank. It's been running for 3 years and is a 180L tank at 25.5°C. I thought it was a bunch of detritus worms but its coming directly from inside the wood. Is this dangerous? Should I siphon it out? Take out the driftwood all together or what? Ive included photos. The fish seem uninterested in it. Never seen this before!!








Edit: This definitely isn't the white slimy bloom that occurs on new driftwood. Its bright white and stringy.

 

I siphoned some off and it immediatley grew back!? Help!!

 

I'm no expert on this topic, but maybe try taking it out and cleaning?

 

It stopped leaching stuff after about an hour; I kept siphoning off the white stuff. Still no idea what it was though.

 

Its fungus. Harmless for fish/inverts, and many enjoy eating it!