Here is some pics of my orange sponge that came with my live rock. I have been watching my tank everyday and i started to notice this gray looking film that started to grow on the arms of the sponge. I thought it was like detitrus and blew it off with my feeder. Well now its back and it looks like I can see right through the sponge. Is my sponge dying? What can I do to help it so it won't die?