Mold On My Driftwood?

Is it a white looking mold? Ive had this, usually in a newly set up tank which has been thru a fishless cycle, but I just take it out, scrub it and put it back in, doesnt normally come back :)
 
Is it a white looking mold? Ive had this, usually in a newly set up tank which has been thru a fishless cycle, but I just take it out, scrub it and put it back in, doesnt normally come back :)


No its black looking like mildew and there is also some blue mold. I have no idea how blue mold could be on it.
 
Algae? I regularly take out my driftwood and scrub it with a brush --- I only use this brush for that purpose; never for cleaning anything else.
 
Algae? I regularly take out my driftwood and scrub it with a brush --- I only use this brush for that purpose; never for cleaning anything else.

I take it out of the water for months and put it back in and it just keeps growing. :blink:
 

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