I have a 125 gal that I cycled with feeder goldfish (I know, bad idea) After I took them out I noticed what looked like a bunch of what can best be described as hollow fecal matter. It was a curled up hollow sac almost, maybe a little larger that fecal mater, I dont know though I never really keep goldfish. Could these be some sort of parasite egg sac? If so please point me in the right direction on where I could find more info on what it could be and how to treat if needed.