Home » Community » what is that this? Some kind of black stuff on the biofilm on my wooden. Will it hurt my betta or shrimp? what is that this? Some kind of black stuff on the biofilm on my wooden. Will it hurt my betta or shrimp? aeronatha April 2, 2022 Community SaveSavedRemoved 0 Deal Score0 1 10 Deal Score0
My best guest would be black bearded algae.