Identification help !!

[tinytanya7]

What is this bush that is growing on my rock?? It started small and continues to grow! Does anyone know what this is? And how to remove it?

 

[shakacuz]

turf algae, perhaps. might help to dose hydrogen peroxide directly onto the algae at: 1ml/10g. scrub anything else off and try to siphon it out as you scrub it off. or, if able, take the rock out and do it outside the tank. increase the diversity of your CUC so that you have things that eat a variety of algae to reduce this from occurring again.