Is your combined chlorine too high? If so, you're not alone. Combined chlorine is often...

Chloramines and other airborne pollutants in indoor swimming pools behave differently than the rest...

Almost all natatoriums have challenges with rust and corrosion on metal parts like screws, door...

Swimming pools need a residual sanitizer. Chlorine is the most commonly used sanitizer in swimming...

Last night, I got word that we lost our dear friend, coworker, and brother to ALS. And while we all...

Each and every year, reports come out of swimmers getting respiratory sickness from indoor swimming...

While chlorine dominates the aquatics market as the most popular residual sanitizer, many pool...

This article expands upon our previous article about stainless steel corrosion. While that article...

Swimming pool water quality is about keeping the water clean, safe and healthy via disinfection....

When we are contracted to evaluate natatoriums with air quality problems, we look for structural...

Sometimes we get calls about indoor pools having algae. But how can that be? Algae need sunlight to...

Chlorine is becoming more expensive and difficult to get. Since the COVID-19 supply chain shortages...

Our core service is conducting natatorium facility studies. This article explains what we do (and...

When bathers enter the pool, there is a time delay between the formation of harmful disinfection...

We are frequently asked what air and water temperatures should ideally be for indoor swimming...

We receive a surprising amount of requests for help with home indoor pools, also known as...

Let's discuss the differences between chloramine, or chloramines, versus actual chlorine. They...

Of all water chemistry parameters, many experts argue that pH is the most important. Indeed, pH...

Commercial swimming pools are different from residential pools in many ways, though water chemistry...

While most outdoor pools in cold areas get winterized and covered, some stay open year round. They...

Swimming pool covers are used for a variety of reasons on outdoor pools: safety, protection from...

Today we ask an important question: why are swimming pools required to discard the water that is...

Got combined chlorine in your indoor swimming pool? If so, you're not alone. And not all combined...

Swimming pools need chemicals to stay clean and balanced, but make no mistake, these chemicals can...

One of the biggest differences between residential and commercial pools is chemical automation....

Whether we like it or not, indoor swimming pools are warm, humid environments. By virtue of how...

Indoor swimming pools evaporate approximately their entire volume of water each year. And because...

When air quality is bad in a natatorium, swimmers, coaches, lifeguards, and spectators all suffer....

Fast swimming pools are considered "fast" when swimmers perform well in them. It's sort of an...

In the era of COVID-19, common-sense hygiene and "social distancing" have become a new normal. If...

Fact: competitive swimmers pee in the pool. And while it's not necessarily every swimmer, peeing in...

Today we are going to tackle a question we get regularly: does showering before swimming really...

Stainless steel "stains less", but it is not stain proof. Indoor pool equipment is very often...

Continuing our conversation on secondary disinfection and oxidation systems, today we are...

Swimming pools can be subdivided many different ways. Today, let's focus on how surface water is...

An Olympic sized swimming pool is 50 meters long, and at least eight lanes wide. The official...

We are often asked for our opinion about UV and Ozone systems, and to compare them. The problem is,...

Trihalomethanes (THMs) are harmful disinfection byproducts (DBPs) found in drinking water and...

Ultraviolet (UV) systems are proven and effective secondary disinfection systems. They are used in...

In natatoriums, When the air gets rough, the fans get blowing.  And that's not always a good thing.

Many natatorium design problems can be prevented if designers and contractors understand the...

We wrote a previous article about five common mistakes in natatorium design. Now let's talk about...

Think of all the indoor rooms you have been in. Offices, classrooms, restaurants, your bedroom,...

How do mechanical engineers know what to design for specific rooms, like natatoriums? What ...

The old, obsolete approach to natatorium air quality sounded like "the solution to pollution is...

Does the type of swimming pool filter really matter? Are the differences between pool filters even...

Pool Dehumidifiers and air conditioners are not equal. Indoor swimming pools have variables and...

Indoor air quality in natatoriums has many variables and moving pieces, but at the end of the day,...

Trichloramine, trihalomethanes and other noxious disinfection byproducts (DBPs) that off-gas from...

This is a brief article to shed light on a problem of semantics in natatorium design. Too often,...

Common Natatorium Design Mistakes

Natatorium design is a niche skill. Moreso than typical commercial buildings, indoor pools have...

This article is a republishing of a guest blog written by Eric Knight for the NSPF in 2017, found ...

Relative Humidity (RH) is the amount of water vapor in the air, relative to how much the air can...

When the air goes bad in a natatorium, common practice is for swim coaches, lifeguards or even...

Want to learn more about the air side of the pool air quality problem? This article and its...

To truly understand the indoor air quality problem, we need to understand the different components...

This article expands on our last article, Part 1. Here we will focus on the process of handling...

With a basic understanding of pool chemistry, the air quality problems of indoor pools become...

If you have ever been involved with a capital project, such as a new building or a big construction...

A natatorium is a room that contains an indoor swimming pool. These rooms are very unique and...