10/12/2026
See that back corner of the basin? The water there barely moves. 👀
Every cooling tower has dead zones. Corners, the edges under the fill, the far side of the basin away from the suction. Flow slows down, and whatever the tower scrubbed out of the air settles right there.
That sludge isn’t just ugly. 🧪
Biocide and inhibitor have to reach the metal to work, and they can’t push through a layer of muck. Underneath it, biofilm grows undisturbed and corrosion gets a head start.
It’s also exactly the kind of warm, slow, nutrient-rich spot Legionella looks for. ⚠️
The fix isn’t more chemical. It’s getting water moving where it’s stalled, cleaning the basin on a schedule, and having someone actually look in the corners on every visit.
Clear water at the suction tells you about the suction. The corners tell you about the program. 💧
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