Originally Posted by Murf
What is this algae? And please tell me how to get rid of it. Or why it's here. I just started a 55 gallon reef up and running as of a week ago...
Looks like a diatom bloom.
One week ago u setup ur tank and already have corals? Did u get used water from an established tank? I can't see you cycle being finished yet. Hence one of the reasons you have a diatom bloom. Its part of the early stages of the cycle. It will come and go throughout the years.
Have you got urself a clean up crew yet?