Please Help. I Have New Salt Water Tank That Im Setting Up For Fish Only. Right Now I Have 3 Fish In It And They Look To Be Content. Let Me Back Up It Is A 20 Gal Tank That Has Been Running For Like 3 Weeks And Fish In It For About 5 Days. Ok On With The Story, There Is So Much Brown... Algey I Guess That If I Clean It Maybe 2 Days Later At The Most Its All Back. It Covers Everything And I Mean Everything. What Is This And What Can I Do About It. Please Help It Starts To Make The Living Room Smell Bad. Thanks In Advance