1 have 4 Corys along with other fish. I have 3 different types of sinking food one of which is shrimp pellets. The other fish like these too so I usually put in 3-4 pieces so the Cory’s have a chance to get some. The shrimp pellets get picked up by the other fish and dropped and then seem to get lost in the gravel. Is there some type of feeding bag I could put them in so they don’t get pushed under the gravel?