for my bottom feeders, I usually toss in a pellet of freshwater food, everynow and again. I use the shrimp pellets from wardley. It sinks to the bottom and is usaully to hard for a little bit, so Pennywise9clownfish) and Torch (firefish goby) don't bother with it. Then the dwellers can get it. My cleaner goes nuts on this, he will grab it and then perch on one of my LR and poke it apart. This way it take a long time for the blue legs to get over to him. Just remember not to throw too many pellets in at first. Freshwater food has a habit of clouding the water a lot easier then saltwater food. I don't know why though.
Remember the will to survive is what keeps us going. Same for animals that has been around for a lot longer then we have....so he will probably find something.