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Eric Knight

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Ways to Reduce Combined Chlorine
By Eric Knight on June 30, 2025

Is your combined chlorine too high? If so, you're not alone. Combined chlorine is often misunderstood, so this article expands on our previous article about it. We want to show you both the...

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Molecular Weights of Airborne Chloramines in Indoor Swimming Pools
By Eric Knight on June 24, 2025

Chloramines and other airborne pollutants in indoor swimming pools behave differently than the rest of the air in the room. This is mostly because they are heavier than nitrogen (N2) and...

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Scientific Explanation of Metal Corrosion In Indoor Swimming Pools
By Eric Knight on January 2, 2025

Almost all natatoriums have challenges with rust and corrosion on metal parts like screws, door handles, hand rails, starting blocks, and light fixtures. On stainless steel, the rust first...

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Remembering Derek Ingram
By Eric Knight on September 13, 2023

Last night, I got word that we lost our dear friend, coworker, and brother to ALS. And while we all knew this day was coming, it is incredibly difficult to write this. Perhaps in my mind,...

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Chlorine Cough After Swimming
By Eric Knight on July 16, 2020

When air quality is bad in a natatorium, swimmers, coaches, lifeguards, and spectators all suffer. Exposure to airborne chloramines irritates lungs and can cause swimmers to cough. Chlorine...

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Relative Humidity in Natatoriums
By Eric Knight on June 6, 2019

Relative Humidity (RH) is the amount of water vapor in the air, relative to how much the air can hold when 100% saturated. RH is expressed as a percentage (%), where 100% is total...

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Keep the Pool Doors Closed
By Eric Knight on June 6, 2019

When the air goes bad in a natatorium, common practice is for swim coaches, lifeguards or even swimmers to open outside doors. Sure, opening outside doors may give some temporary relief and...

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