I found my GBT shifted back and fourth from bubbled to stringy over the 2 years I had it before I finally sold it. It went from bubbled to stringy to bubbled back to stringy. It also split twice in the first year. I suspect that it may have been the salt mix that I was using that caused the changes because it seemed to be stringy when I used Instant Ocean and then bubbled when I used Seachem or Tropic Marine. I also found in my case that feeding it up to 3 times a week made it grow huge very quickly.
BTW it was in my frag tank. Thats why there is coral hanging from fishing line in the picture.
