I have a juvenile Convict Tang caught from a tidepool back around the Fourth of July and man does it go to town on GHA. I knew they were grazers but it's amazing how much it can go through especially given its size. Originally I strayed away from the idea of having a convict in my tank but this little dude is changed my mind completely! I can't wait for when I transfer it into my DT so it can mow everything down.