what is it

[White Hair]

This growth was on the rock when i purchased it, the growth has doubled in size in 3-4 months,my wife was watching it and said it moved,it is the red and green growth, thanks

 

[T_BONE]

Green hair algae and maybe Cyanobacteria. Hard for me to tell from the pics on my phone. You can more than likely manually remove that pretty easy. And I also see an Aptasia..