I was excited about the Instant Ocean gel feeder block that came inside the Baymac goody bag. My two medium-sized tangs they consumed the entire block on Sunday. They have obviously swollen abdomens! Wish I had taken some photos. No more food for a few days for the fat fish! If your tangs have similar levels of impatience & appetites, I recommend cutting the gel block into smaller pieces before placing it into your tank.