Man I just discovered my birdsnest and some other sps have STN I guess? They are slowly dying at the tips and or base! I am adding a additional koralia 4 to increase flow. I might not have had enough, I just moved from a 75g to a 90g and only had the return and a K4. Does anyone have any concerns with STN or does it just go away with more flow and coral placement? Also should I take the colonies out and dip them as I would if they were new to my tank? Many have said I should just snip the dead pieces off and it should take care of the problem? What do you guys think?