My tank as been up and running since April and I now see to have some sort of algae growing all over it. This tank is an upgrade from a previous tank so about half of the rock was already cycled and the other half was dry from marco rocks. Is this algae just a phase of the tank. I am only feeding once every three days. Water changed regularly. I have a refuge with cheato growing like crazy. The algae is very thick, like a mat. It starts out green then turns to red/brown and creates almost a blanket. I do have CC for the substrate which I know isn't the best to some people, but I am looking for any suggestions as to get rid of this stuff.