Well since I just got it yesterday, I just bought today:Kent Marine Phytoplex (Marine Phytoplankton), and when I got home this evening I added 1 capful. It is a 54 gallon bowfront tank. I have a cascade 700 with a spray bar, and it moves the water pretty good. Nothing stays still in this tank. I have been told by my lfs salesperson that it is normal for the polyps to come and go. BUT I am worried about the limp branch.