What a Fish Farmer Cannot See From the Bank
Water conditions in a pond change faster than anyone can walk the bank. Dissolved oxygen falls overnight, and by the time the surface behaviour looks wrong the stock has already been stressed for hours. A single bad night can undo a season, and it happens while everyone is asleep.
That asymmetry between how fast the water moves and how often anyone looks is the whole promo. It needs no explanation to a farmer and cannot be explained to anyone else in thirty seconds, which is exactly the right targeting for a promo. What does not belong on screen is your own species and threshold data: safe ranges differ by species, stocking density, and temperature, and publishing a number invites a farmer to apply it to the wrong pond.
The promo runs across six scenes: one on the pond at three in the morning, one on oxygen falling with nobody present, one on the alert arriving on a phone, one on the aerator starting, one on the morning that did not become a loss, and one on the next step.
