Your Ammonia Test Is Lying to You. Here Is What Actually Kills Fish.

Sun, 01 Mar 2026 00:00:00 +0000

Levi and Jeff Lee run a catfish farm in Macon, Mississippi. For years, their summer nights looked the same: wake up at 2 AM, walk the pond banks with a flashlight, listen for the sound of fish gasping at the surface. If they heard it, they fired up the paddlewheel aerators. If they slept through it, they woke up to dead fish.

That is not a monitoring system. That is a grower betting their livelihood on whether they hear splashing in the dark.

Science on FarmHub

Your Ammonia Test Is Lying to You. Here Is What Actually Kills Fish.