Real or fake?

[Somykidswantedanaquarium]

So I have this coral looking thing ha in my tank (came with it from my aunt) is it a good idea to have in my FW tank as a decoration? Is it even real?



Front view

 

[bettaowner]

Is it heavy? If it is I think it's real. It would make the water harder I believe.

 

[Somykidswantedanaquarium]

Side view disregard black line it's a crack in my lens

 

[Somykidswantedanaquarium]

Yes it's heavy and I noticed some green maybe algae on it and some really fine white hair things

 

[Somykidswantedanaquarium]

Not sure if you can see it

 

[Somykidswantedanaquarium]

Looking closer they are green hair like things