My friend gave me some large amano shrimp for my tank and they are certainly hard-working little beasties but they outright steal food from the other fish. The two corys haven't had a proper meal in a week . One shrimp will grab a whole sinking waffer and take off into the undergrowth to hoard and eat it. I've kept fish for years but never shrimp save for ghost/glass shrimp. Any advice with feeding that will give everyone else a chance?