It always has in my tanks. During the first 6 weeks or so of your tank being up(while it cycles), different algea will come and go. Then, as your tank matures, the aglea will change. The brown will go away, then some green, then some red, then some brown again, then some coraline, ect... lol (perhaps not in that exact order) My point being, by the time your tank has matured in a year or so, you will see pretty much every color of the rainbow in algeal growth. Just keep up on the water conditions, and it will stay in moderate amounts. HTH.
By the way....most of the time having algea in the tank is not really a bad thing....just look out for red slime and such....good indications of a problem in water chemistry.
"J"
By the way....most of the time having algea in the tank is not really a bad thing....just look out for red slime and such....good indications of a problem in water chemistry.
"J"