What bacteria was is?Dose some bacteria to increase your biodiversity, that was the difference in my tank when I started last feb. since I started dosing bacteria, the system has been thriving, sps stopped stn, and came back to life. its amazing how a sps frag can go half dead skeleton, to growing new tissue in a matter of a couple of weeks... This is my experience... a friend of mine minus9 recommended that I get some bacteria from algae barn, and it the best thing I have done to my tank.