white fungus

Hi guys, I am new to saltwater tank. Built a 25 Gallon tank 15 days ago and i have few live rocks in it. One of them is getting white fungus kind of stuff and i am worried about it. Can someone help me finding what is it actually and if i need to remove the rock or any other remedy. Thanks

I noticed my tank had these little white specs over my glass. It's a little bigger than copepods but not sure what to do? Can anyone help me!