Some of the slides of the ice stalagtights are really interesting. Here is what happens. As more and more salt gets squeezed out, the water becomes more and more saline. As such it can absorb more heat. It is also ore dense than the surrounding water.
Small depressions begin to form in the ice and the more dense saline water flows down.
As the more saline water absorbs heat from the liquid water around it, the liquid freezes forming a tube of ice with super saline water inside. They will be returned after the photography. There will probably be a TV program special made from the video that was taken here by Norbert Wu and his diving team. He is also experimenting with high-density digital photography. He showed some of that film during a science night lecture.