See, a septic tank is like a big underground pot where waste slowly cooks into sludge and gas. That gas has hydrogen sulphide—rotten egg smell, but heavier than air, so it sits inside waiting. A man goes in, the gas replaces the air in his lungs, and he’s gone in one breath. They call it ‘kala pani’ for a reason, beta. My own cousin lost a friend that way, trying to clean their own tank to save money. After that, my father made a rule for our street: never trust the silence of a tank, even if you can't smell the danger anymore.
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