I have had a choc chip in my 75 gallon whatever tank. It is a strage experiment tank in what can and cant mix together. I have had the chip in this tank for over a year along with anemones, puffer fish, SF eel, and triggers. Cant tell you why but no one has ever even tried to eat him, nor has he ever caused any damage. I dont think I have ever really fed it directly, it does a good job of moving around and taking care of itself. It has eaten a few snails that were stuck upside down however.
Mit freundlichen Grüßen