I have a relatively new tank (only about 10 weeks old) and am wondering about algae growth. I have a brown algae that is growing rapidly. I clean the glass surface and in a couple days the algae is so thick I can't see in the tank. I have a ro/di unit that is brand new that I have been using. I also have a bunch of snails in there but they don't stand a chance at keeping up. Is this algae normal? Will this continue forever?