Nephew called. Came home to a fish kill.

Details:
Southern Illinois
5 years old
3 acres
Half covered with watermeal (no chemical treatment since last year)
Crystal clear water
No big rains in last three weeks
No crop spraying in immediate or upstream area
Cool front did come in last couple days
No dead fish as of this morning
Guessing 230 dead fish seen as of few minutes ago
Bluegill, Bass, Channel Cats

Pond is close to his house. Encouraged him again to consider an aeration system for future.

I think he is going run boat motor on in hopes does at least a little good.

Thoughts? Suggestions?

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