Unsure if Algae or something else

[Clickcase]

Not sure what this bit of white patchyness is, i dont remember this in my last tank. Any guidance helps, thank you!

 

[EnterName]

I'm not sure I see what you mean, but it's possible that sponges are growing on your rocks. I'm seeing mostly the rock structure which has some pores so I can't tell if there are sponges or it's just the rock itself.

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If you are seeing white slime somewhere that can easily blown off you either have some bacteria growth on that spot or a form of Chrysophytes which appear in young tanks from time to time.