Well, I give him green colored marine algae as per my lfs's recommendation. When he went through a cycle of Ich, I dipped the algae in Zoe and minced garlic. He ate it right up. When I go to feed my eel, either scallops, or squid, he snatches some of that as it falls off of the tongs. I was shocked when I saw him eating that, because I thought he was a vegan, but hey, if he wants to eat meat, I cant stop him.
Because of all of the algae, I couldnt see if he ate his regular diet of algae the other day. I did a disease check on another website, and it mentioned a possible parasite, called something like Chilodonella, which may cause flat spots to appear on the sides of the fish. They recommend freshwater dip, and then a copper treatment. I know all about what copper can do to an aquarium.