What is this ?

I have had this growing slowly in my DT for about a month now. I have looked around to try and ID this but I can't come up with a definate answer to what it is. It is the redish orange, leafy looking algae(?), with light colored spots on it. Anyone have an idea to what this is and if it is good or bad ? Sorry for the poor picture quality, its the only camera I have.

Thanks !