Thanks Steven. I guess it is possible it's closed up, maybe it will be open when I get home today. It sure looked like it was gone though. This tank has hit a rough patch though as it's approaching 1 year and I don't dose anything, I think it's beginning to kind of plateau. I'm trying to increase water changes to keep the nutrient levels up. I don't run chemical filtration. Also, my skimmer pump died a few weeks ago so this tank has been skimmerless and I have not been able to replace or fix it. I would put an emphasis on that, but I have a new tank that is *almost* ready to go with a lot better equipment and maintenance setup, so I'm really hoping to get everything moved over there before I take the 'next step' on my reef.