It's a full blown reef system. 3-8 spots per fish daily. Only a few fish get it, my7 Sargassum, Atlantic Blue, and 1 or 2 spots on my hippo's. The Atlantic blue seems to be perpetuating it because he always has the most number of spots. It seems as though it has leveled off meaning that it isn't increasing in numbers. Should I place my UV in the main system rather than the sump?