Was ist das (what is this?)

[m.parker]

i noticed this growing on my driftwood, looks like mold that grows on fruit... hum???

 

[rkilling1]

This thread should explain it:

http://www.aquariumadvice.com/viewtopic.php?t=83827

 

[m.parker]

hum.. ok thanks.. i guess ill wait...

 

[Marconis]

Du spreche deustch?