Search results

Can someone tell me what these are and what I need to do about them. I went on a weeks vacation and had a friend feeding my fish, when I got home I saw these. I counted about 40, but can not find anything on line that resembles them.

I just got a 180 gal tank for free from a friend who was deploying. It had already had some algae growing in the tank but after the move it really spread like mad. I checked the phosphates and nitrate levels but they seem to be normal. I brushed the algae off of the coral and placed it in a...