Ghost shrimps are known to devour fish faeces that has accumulated at the tank's bottom. Fish poop, on the other hand, isn't a component of their normal diet in the wild. As a result, they won't eat Betta fish waste like they would algae or decaying organisms. Betta Fish waste will turn into bio-film in a well-matured tank. And, in most cases, ghost shrimps will eat the biofilm rather than the faeces. On this, hobbyists have differing viewpoints. Some claim their Ghost Shrimps eat faeces. The others claim that their Ghost Shrimp has never eaten crap. So, while there's no guarantee that your ghost shrimp will eat fish faeces, they'll most likely do so.  Fish poop is neither beneficial nor bad for ghost shrimp when ingested in moderation. Fish excrement is high in protein and minerals such as phosphate and potassium. It is, however, high in ammonia, which can affect your health if ingested in large quantities. Ammonia is extremely harmful to shrimps, with the ability to wipe out an entire colony. It not only weakens the immune system and causes diseases, but it also reduces the shrimps' reproductive capacity. As a result, don't count on ghost shrimps to clean up the fish waste in the tank. Betta Fish faeces can make up a tiny part of their diet, such as snacks, but it should never be used to replace shrimp food.