Need Help

[duramax2k4]

new to this hobby, some type of brownish algae looking stuff just started forming on my tank glass 2 days ago, today its all over live rock also. Is this good or bad?

 

[lsu]

Diatoms. They are common in newly established aquariums, they should go away with time.

 

[duramax2k4]

that stuff hits tank fast