I have the coralife superskimmer, and have had it for about 4 months. All of a sudden it's started making millions of tiny bubbles, they are coming out of the vents on square filter cup thing. I'm not sure why all of a sudden I am having thing problem, I even changed the filter in it thinking it may be old or dirty, but that didn't help either. Has anyone else had this problem? And if so, what did you do to fix it? thanks