I have a problem with diatoms i believe. I have just set up my aquarium and there seems to be this brown algea that has grown on the tops of all the rocks and the sides of the aquarium. It is brown and contains bubbles that are released into the aquarium. I am using a hang on the back filter temporarliy until my sump filter comes in sometimes later on this week. The steps I plan to take are to get my protien skimmer up and running and then to use some sort of silicate remover in the sump. Let me know what else I can do to remove this.