I have a 55 gal sw tank. I have a 4-6 week new growth of white tube like things that have a blob as the base. I cannot find anything like it on line and they do not seem to be taking over at all. I just noticed that when I changed my filter cartriges they let out very long hair like strands. They stayed attached and there were several per tube. Anyone got any ideas. Also very new is that some of my rock seems to be heavily dusted with what looks like a pale biege powder and now my amonia up for reasons I cant figure out. No new fish, no dead fish, I cut back on feedings recently so I know its not overfeeding issue, 25% water change less than a week ago, I just don't know.