I just setup my first Saltwater tank (16g LED Biocube) This is week 2, I have some live rock in the tank and just put in my cleaning crew. There is some green algae growing on the live rock. I was wondering is this a sign of something being wrong? If I want to remove it from the tank what would be the best method? I plain to grow some soft coral in the tank and have a fish or two. Any help or guidance would be great as I am new to the whole saltwater hobby.