Topic Explanation
The discussion revolves around an individual experiencing an unusual occurrence in their ostomy pouch. They have noticed small, hard, black, sand-like grains in their output, which they cannot relate to any food they have consumed. They are concerned about the nature of these grains and are seeking insights from others who might have experienced something similar or have knowledge about what these grains could be.

Advice and Helpful Insights
1. Possible Food Residue:
- Several responses suggest that the grains could be undigested remnants of food. Specifically, bananas were mentioned as a potential source since they contain small seeds that might not be fully digested.
- Another suggestion was that it could be remnants of other foods or seeds similar to those found in "seedless" watermelons, which still contain small seeds.

2. Medical and Lab Testing:
- It is recommended to consider medical testing such as a CT scan, MRI, or lab testing of the grains to rule out other possibilities or confirm their nature.

3. Medication Residue:
- One participant mentioned experiencing similar issues with medication that is time-released, not breaking down completely and appearing as small particles in the pouch.

4. Handling and Observation:
- Advice against trying to crush the grains was given, noting that it could risk damaging the ostomy bag.
- It was suggested to simply rinse the bag with warm water to clean out the grains without causing any damage.

5. General Observations and Considerations:
- Some participants expressed that as long as the grains are not causing discomfort or pain, they might not be a significant issue.
- Curiosity about the nature of the grains led one individual to question if they could be parasitic eggs, although this was not confirmed.

6. Humorous and Miscellaneous Comments:
- There were humorous remarks about the nature of bananas and dietary habits, though these did not contribute directly to solving the query.