The topic at hand is about dealing with night-time gas build-up in an ostomy pouch. This can be a common issue where the pouch stays flat during the day but inflates with gas overnight, causing discomfort and sleep disturbances. Here are some helpful insights and advice to manage this situation:

1. During the day, gas is released each time you empty or "burp" the pouch. At night, the pouch remains sealed, allowing gas to accumulate, which can make it feel like a "blowfish."

2. Even healthy foods, including fruits and vegetables, as well as all carbohydrates, can ferment and produce gas. Consider reducing or timing your intake of these foods earlier in the day to lessen gas at night. For example, one person stops eating solid food after noon and only drinks herbal tea or water later.

3. Avoid high-fructose corn syrup, as some people notice less gas when switching to sodas made with real sugar.

4. Try using pouches with more effective or higher-capacity filters. You can request free samples from companies like Hollister and Coloplast to find a system that vents better for you.

5. If the filter's performance is still unreliable, consider these options:
- Manually "burp" the pouch before pressure builds up.
- Use an irrigation sleeve folded up as an extra-large overnight pouch.
- Switch to a compatible high-volume (large-capacity) bag for sleeping hours.

6. Simply emptying or releasing gas once during the night can prevent over-inflation. Rearranging the pouch position in bed can make quick in-bed burping easier and may help avoid disturbing your partner with any odor.