What are these?

[EddieJ123]

I have had this tank for 3-4 weeks I have this algae that I think are diatoms but I also how these white hairs
I worried because I don't know if it is good or bad. Plz help

 

[Dav3]

Algae. Looks like a type of hair algae growing on the glass.

 

[s007m77]

Normal for just starting a tank