I need help!! I'm pretty new to the saltwater world but I have a 6gal fluval edge tank.. With what I think is brown algae? I'm a bit of a perfectionist so it's killing me.. My tank is 5 weeks old ..All my tests are great, Sg is 1.023 .. My 2 clowns seem happy as can be, I have about 10 hermit crabs, skunk cleaner shrimp, and a snail.. How can I get rid of this!!?