Update: Another big fish kill.

Backstory: He installed aerators. He had to have them rebuilt after 6 months. They did so under warranty. They quit again about a month ago. Lots of water meal again. Temps dropped again. Fish kill again.

He's frustrated at apparent lack of longevity for aerators and at second fish kill.

Advice?

Also asking if any consultants in this area of southern illinois who could take a look at it and offer guidance.

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