New reefer here. What is this growing on my dry rock?

[Superheat13]

New to the hobby. I have a Redsea 425xl that is 10 days into cycling using the Redsea reef mature cycling program. The tank has live sand with dry rock. A few days ago I started to notice some fibrous white/clear growth on the rock that has rapidly accelerated and some of it is now detached, floating around the tank. Is this a normal part of the process or something to be concerned about?
Thanks!!!!

 

[blaxsun]

Normal.

 

[MaxTremors]

It’s bacteria.

 

[Superheat13]

It’s bacteria.

So it's normal?

 

[Just a Wrasse.]

So it's normal?

Yes, it's fine.

 

[Just a Wrasse.]

Normal.

Definatly