Black Algae, Breaking into eCommerce, Acid Slugs, & True Pool Crimes

When it comes to pool maintenance, myths die harder than black algae on plaster walls. In a recent episode of the Talking Pools Podcast, industry professionals tackled some of the most persistent misconceptions plaguing the pool service world, from the infamous "rooted" black algae to the mysterious acid slug technique. If you've ever found yourself arguing with other pool pros about these topics on Facebook groups, this episode is your ammunition.

The Black Algae Myth That Just Won't Die

Perhaps no topic generates more heated debate in pool service circles than black algae. Despite scientific evidence presented years ago, the myth of "rooted" black algae continues to spread like, well, algae itself. The reality is far more mundane but equally important to understand.

I was having a I had a different thought because, you know, it was six years ago, seven years ago now when I went and samples of black algae and proved without a doubt that this was cyanobacteria, not algae, it was a bacteria seven years ago... But anytime, anytime I see someone ask you questions like, Hey, I got black algae in my pool. Ultimately three or four people will come back and say, well, if it's rooted in and I just think to myself, when do I get tired of telling people there are no fucking roots?

— Podcast Host, Talking Pools Podcast

The truth is that black "algae" is actually cyanobacteria—a type of bacteria that forms biofilms. These biofilms are naturally sticky and adhere to surfaces through their cell walls, not through any root system. The misconception likely persists because the bacteria can penetrate into small pits and crevices in pool surfaces, making it appear deeply embedded.

Understanding this distinction isn't just academic—it affects treatment strategies. When pool professionals continue to believe in the root myth, they may over-treat pools or use ineffective methods, leading to frustrated customers and wasted resources.

Why Black Algae Keeps Coming Back (Hint: It's Not the Roots)

The persistence of black algae in the same locations has led many to believe in the root theory, but the real explanation is much simpler and more logical. When cyanobacteria colonizes a surface over time, it actually feeds on minerals in the pool finish, creating tiny pits and imperfections.

You had a pool. If you have a pool that needs to be replastered, then you definitely have those pinholes where it gets like the surface of an English muffin with all the little nooks and crannies... So you have a cell, the cell divides now you have two cells, it divides then you have four cells. This is how this grows, but it's cell on top of cell on top of cell on top of cell.

— Podcast Host, Talking Pools Podcast

These microscopic "caves" provide perfect hiding spots for bacterial cells. When you treat the water and kill the surface bacteria, deeper cells protected within these pinholes may survive. As the treatment chemicals dissipate, these surviving cells multiply and recolonize the same area. This creates the illusion of rooted growth when it's actually just protected bacterial cells in damaged plaster.

The solution isn't more aggressive chemical treatment—it's addressing the underlying surface damage. Pools with persistent black algae problems often need resurfacing, not just better chemical treatment.

The Acid Slug Technique: Chemistry Doesn't Lie

Another persistent myth in the pool industry involves the "acid slug" technique—the belief that how you add muriatic acid to a pool affects which chemical parameters it impacts. Some professionals swear that pouring acid slowly in one spot will lower total alkalinity without affecting pH, while broadcasting it across the surface does the opposite.

The chemistry behind it tells us that's impossible. Muriatic acid is hydrochloric acid. The formula is HCl. Every time I add HCl to water, hydrochloric acid, the result will be the same no matter how I add it. It will dissociate into hydrogen and chloride.

— Podcast Host, Talking Pools Podcast

The chemistry is straightforward: hydrochloric acid (HCl) dissociates into hydrogen ions and chloride ions when added to water, regardless of how it's introduced. Since pH measures hydrogen ion activity, it's impossible to add hydrogen ions without affecting pH. The method of addition doesn't change the fundamental chemical reaction.

This myth likely persists because pool chemistry can seem counterintuitive, and the relationship between pH and total alkalinity is complex. However, understanding basic chemistry principles can save pool professionals from ineffective treatment strategies and help them better educate their customers.

Field Safety: When Pool Service Gets Dangerous

Pool service isn't just about chemistry and cleaning—it can be genuinely hazardous work. The podcast hosts shared some harrowing stories from the field that highlight the importance of proper safety equipment and procedures.

One particularly striking story involved a foreclosed property where the pool had sat vacant for seven years. The owners had actually introduced tilapia fry to combat mosquitoes, and the fish had grown to 10 inches long. During cleanup, landscapers had cut bamboo at 45-degree angles, creating natural spears hidden under sand.

My guy, he's wearing sneakers. Actually, wearing sneakers not flip flops, crocs or any other unapproved shoes. Stepped on it, went through his foot, came out the top... In this case, you know what saved them? Channelox and duct tape.

— Podcast Host, Talking Pools Podcast

While the hosts joked about field repairs with channel locks and duct tape, the story underscores serious safety considerations. Proper footwear is essential, but even safety-conscious technicians can encounter unexpected hazards. Having a plan for medical emergencies and knowing when to seek professional medical help can mean the difference between a minor incident and a major injury.

The Education Challenge in Pool Service

One of the most frustrating aspects highlighted in the podcast is how slowly accurate information spreads through the pool service industry. Despite scientific evidence being available for years, myths persist and continue to be shared in industry forums and training materials.

This educational lag affects everyone in the industry—from new technicians learning incorrect information to experienced professionals who must constantly correct misconceptions. It also impacts customer relationships, as homeowners may receive conflicting information from different service providers.

The solution requires a multi-pronged approach: better initial training programs, more emphasis on continuing education, and industry leaders consistently promoting evidence-based practices over traditional "wisdom" that may not hold up to scientific scrutiny.

Breaking Into E-Commerce: Diversifying Your Pool Business

While much of the episode focused on technical issues, the hosts also touched on business diversification, particularly the growing importance of e-commerce in the pool industry. As customer expectations evolve and online sales become more prevalent, pool service companies are exploring new revenue streams.

E-commerce offers pool professionals opportunities to sell chemicals, equipment, and accessories directly to customers. This can provide additional income while also ensuring customers use products the service provider trusts and understands. However, it also requires new skills in digital marketing, inventory management, and shipping logistics.

Successful integration of e-commerce into a traditional pool service business requires careful planning and often starts small—perhaps offering chemical delivery services to existing customers before expanding into broader product lines.

Key Takeaways for Pool Professionals

The discussions in this episode highlight several critical points that every pool professional should consider. First and foremost, staying current with scientific understanding of pool chemistry and biology is essential for providing effective service. When industry myths persist despite contrary evidence, it creates confusion and ineffective treatments.

Safety should never be compromised, regardless of deadlines or productivity pressures. Proper protective equipment and safety procedures aren't suggestions—they're requirements that protect both technicians and business owners from liability and injury.

Finally, the pool service industry must embrace better education and information sharing. When professionals share accurate, science-based information, it elevates the entire industry and improves customer satisfaction. Whether it's understanding the true nature of black algae or the chemistry behind pH adjustment, knowledge is the foundation of professional service.

As the pool industry continues to evolve, those who embrace accurate information, prioritize safety, and adapt to changing business models will be best positioned for long-term success. The myths and misconceptions may be persistent, but they're not permanent—with enough education and evidence, even the most stubborn industry beliefs can eventually change.

Episode Chapters

• 00:00 Introduction and True Crime Jokes
• 05:30 Stingray Safety and Field Injuries
• 12:15 Black Algae Myths and Scientific Reality
• 25:40 The Acid Slug Technique Debunked
• 35:20 Field Safety Stories
• 42:10 Industry Education Challenges