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King Technology Reinvents Algae Control With Award-Winning Drop-and-Go Innovation

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King Technology Reinvents Algae Control With Award-Winning Drop-and-Go Innovation

In an industry where ease of use, safety, and sustainability are top priorities, King Technology continues to raise the bar for pool and spa water care. Known for its popular Frog® line of mineral-based sanitizing products, the Minnesota-based company has earned a reputation for making water care easier and more effective for both homeowners and service professionals. At the 2024 International Pool | Spa | Patio Expo in Las Vegas, King Technology’s newest release — the Frog® Algae Blocker 4Pro — was recognized as Most Innovative Product for Service Pros, solidifying the company’s position as a market leader in user-friendly pool care solutions.

A Culture That Fuels Innovation

While King Technology may be headquartered in a region not typically associated with pool season — Minnesota — the company has built a national brand around solving water care challenges with a customer-first mindset. Over its 40-year history, King has transitioned from being known primarily as a pool-focused company to one of the most trusted names in spa care as well. Yet, the company’s leadership remains firmly grounded in the pool world.

Behind the scenes, King operates with a culture that prioritizes collaboration, creativity, and shared success. “What really stands out about King is the ‘no ego’ mentality,” said Alex Granlund, Product Marketing Manager at King Technology. “People here want to help each other, speak up, and focus on making sure we’re building products that truly enrich lives daily.”

It’s that mission — to enrich lives daily — that serves as a guiding principle across departments, from R&D to marketing to support. Every new product must pass a simple but critical test: will this make pool and spa ownership easier, safer, and more enjoyable?

Enter: Frog® Algae Blocker 4Pro

King Technology’s latest answer to that question is the Frog® Algae Blocker 4Pro, a revolutionary algae prevention product designed specifically for the service professional. Released in 2024, this EPA-registered product simplifies algae control with a powerful formula delivered in a pre-measured, drop-and-go fabric pod — no measuring, no mess, and no guessing.

“This product is about giving pool pros what they’ve been asking for: simplicity, effectiveness, and peace of mind,” said Granlund. “With Frog Algae Blocker 4Pro, one pod treats 10,000 gallons and protects against algae for six months. That means for a 30,000-gallon pool, just drop in three pods and you’re done.”

Each pod is loaded with copper sulfate pentahydrate — 52% active ingredient — and bolstered by a proprietary blend of four stain-preventing chelants that help the copper stay in solution without bonding to surfaces. “Staining is the number one fear for service pros when it comes to copper-based products,” Granlund said. “So we were incredibly intentional with our formula. We actually include 25% more stain inhibitors than other leading brands.”

A Delivery System Unlike Any Other

While the active ingredients are powerful, the true innovation lies in the delivery system. The product uses a specialized fabric pod that gradually releases the algaecide into the water over a few hours — fast enough to work quickly, but slow enough to prevent any issues with pumps, filters, or salt chlorine generators. There’s no need to shut off equipment during application, and no risk of damage to pool systems.

Once the ingredients are released, the pod floats horizontally to indicate it’s empty and can be discarded — making it easy for pool professionals to spot and remove during their next service visit.

“The fact that it’s seven times lighter than a standard quart of liquid algaecide and completely pre-dosed means there’s less weight to carry, less risk of spills, and less time wasted,” said Granlund. “It’s just a cleaner, faster, more professional way to do water care.”

Designed With Pool Pros In Mind

What sets King apart is how deeply they engage with the pool service community. Granlund explained that the Algae Blocker 4Pro wasn’t developed in a vacuum — it’s the result of seven years of research, including ride-alongs with service pros, focus groups, and ongoing field testing.

“We spent time on the job with techs to understand the reality of their day-to-day — the challenges they face, the equipment they haul, and how unpredictable each backyard can be,” said Granlund. “Every detail of this product, from its chemistry to its packaging, was designed around what we heard.”

This service-first approach has helped King Technology become increasingly relevant among pool professionals — a segment where the company is doubling down. Alongside the new product launch, King has launched an entirely new online resource hub: FrogForPros.com. The site offers training videos, product guides, and marketing materials like homeowner door hangers to help pros explain the value of the product to clients.

And there’s more to come: branded apparel, giveaways, and future webinars are also in the works to keep the pro community engaged and informed.

A Sustainable Solution for the Industry

Beyond ease of use, King Technology is also pushing the envelope on sustainability — a growing concern in the pool and spa industry. According to Strategic Market Research, the pool and spa chemicals market is projected to grow by $3.9 billion over the next few years, with eco-friendly solutions identified as a key driver.

The Algae Blocker 4Pro fits squarely into that future. Its lightweight fabric pod takes up virtually no space in landfills, especially compared to bulky plastic bottles. “Only about 8–12% of plastic is actually recycled, even when it’s labeled recyclable,” said Granlund. “So we worked with sustainability experts and discovered that minimizing plastic volume is the next best thing.”

The long-lasting six-month dose further reduces waste, eliminating the need for frequent chemical top-ups and plastic packaging. The supply chain also benefits: “We’re not shipping heavy bottles full of liquid anymore. We’re shipping concentrated pods — it’s greener, more efficient, and just makes sense.”

Expanding Pod Technology to Retail

With the success of the Frog Algae Blocker 4PRO, King Technology is expanding its pod-based product line for retailers and dealers as well. New SKUs include two algaecides, a phosphate remover, and a clarifier, all using the same stand-up pouch packaging seen in today’s food and consumer goods industries.

“It’s all about making water care as simple and sustainable as possible — whether you’re a pool pro or a homeowner,” said Granlund.

Looking Ahead

With its rich heritage, collaborative culture, and deep bench of water care expertise, King Technology is far from a newcomer. The company has been in business for over 40 years and has quietly built a loyal following across both the pool and spa segments.

But now, with bold new products like the Algae Blocker 4Pro and a renewed emphasis on sustainability and pro outreach, King Technology is positioning itself for the next generation of growth.

And if you ask Granlund, the future is bright — and a little green.

“You’re going to see a lot more from us using this pod technology,” he said. “Everything we’re doing is about making pool care easier, safer, and smarter. That’s what Frog has always stood for.”

Ready to take a deeper dive?

Listen to our entire conversation with Alex Granlund with King Technology on the Pool Magazine Podcast.

5/5 - (15 votes)

Pool News coverage brought to you by Pool Magazine's own Marcus Packer. Marcus Packer is a 20 year pool industry veteran pool builder and pool service technician. In addition to being a swimming pool professional, Marcus has been a writer and long time contributor for Newsweek Magazine's home improvement section and more recently for Florida Travel + Life. Have a story idea or tip you'd like to share with Pool Magazine? Email [email protected] your story idea.

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Features

Adopting Engineered, Reliable Pool Waterproofing Innovations — Why North America pool builders are shifting toward PVC membranes

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If reinforced PVC membranes are such a technically sound and long-lasting waterproofing solution, the obvious question is:
Why aren’t they everywhere — especially in North America, the largest pool market in the world?

The answer lies in how American pools have traditionally been designed and built, and how that tradition has slowed the adoption of more engineered, reliable solutions — even when the performance benefits are clear.

A Legacy of Shape Over Function

One of the defining features of the North American residential pool market — especially since the 1950s — has been its love for freeform pool shapes. Curved, kidney-shaped, lagoon-style, and organically sculpted designs have dominated backyards across the U.S. for decades.

These shapes lend themselves well to gunite construction, which allows complete freedom in form and finish. But they pose a unique challenge for reinforced PVC membranes, which are supplied in rolls, custom-fitted on site by heat-welding and engineered for durability — but not extensive stretch.

Unlike flexible vinyl liners that can be vacuum-formed into irregular curves, reinforced PVC membranes are dimensionally stable and have minimal elasticity, one of the very features that makes them last so long. But that strength and rigidity also means they are best suited to smooth rectilinear shapes or pools with consistent radiuses and defined transitions.

For decades, this technical limitation restricted the adoption of reinforced membranes in a market dominated by complex, curvy pool forms — particularly in suburban residential builds.

RENOLIT ALKORPLAN

Innovation Slow to Enter the U.S. Market

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The North American pool industry has long been rooted in tried-and-true construction models that haven’t changed significantly since the 1940s. In fact, many pools built today still follow the same basic layout and methodology as the first post-war gunite pools:
Concrete shell, plumbing, plaster or tile finish — and little focus on true waterproofing as a separate function.

Meanwhile, European and other international markets, where space constraints and design culture favor cleaner, rectilinear architecture, have embraced reinforced membranes for decades. These regions have led in implementing engineered materials that decouple waterproofing from the structural shell, treating it as a specialized discipline rather than a side effect of the surface finish.

As a result, the U.S. market has largely lagged behind the evolution of reliable, low-maintenance, physics-based waterproofing methods — particularly in the residential sector.

A Building Culture Reluctant to Change — Until Now

Much like other mature industries, the North American pool market has historically been resistant to change, particularly when existing methods are familiar, profitable, and understood by local contractors. However, the tide is turning — thanks to shifting consumer expectations and a new generation of builders and homeowners.

Younger, more informed clients are beginning to ask different questions:

  • “What actually makes this pool waterproof?”
  • “Why do I need to replaster after a few years?”
  • “What will last 20+ years without constant repairs?”

At the same time, builders are becoming more open to physics-first solutions — systems that are engineered to solve specific problems, not just following decades of precedent. That includes better understanding of water pressure, vapor migration, freeze-thaw cycles, and the chemical realities of long-term pool operation. Reinforced PVC membranes provide a waterproofing pool finish with unique benefits not provided by marbelite, stone-colored quartz finishes or thermoplastic coating. The reinforced PVC completely seals the structure of the pool and keeps it watertight, making it ideal for renovating existing pools and building new pools.

Gary Hohne, owner of Brighton Pools was born into the pool and spa industry. His father became a builder of vinyl liner pools in 1954, following the introduction of package pools construction in the industry. Hohne has been in the pool building business his entire life. “This is the only job and industry I’ve even been in,” he chuckles. Originally, his father owned Hohne Pools and more recently Hohne Jr. started a franchise of pool builders called Brighton Pools by Hohne which now has franchises in Maryland, Virginia, West Virginia, Pennsylvania, New Jersey, New York, Delaware, North Carolina, Florida and Tennessee! “Having a family swimming pool business that started 7 decades ago, I have watched the US market for swimming pools evolve over the years and I’m thrilled to have added reinforced PVC membranes to our residential pool construction options.”

RENOLIT ALKORPLAN

Originally Hohne got started with reinforced PVC membrane with commercial pool renovations. “The first reinforced PVC membrane pool we renovated was Constitution Park in Cumberland, Maryland. “The pool at Constitution Park was built in the 1930’s and we completely renovated this 550,000-gallon pool with reinforced PVC membrane,” explains Hohne. “Back then we only used reinforced PVC membrane in commercial applications but in the last 5 years decided to train crews to install this membrane so we can offer to waterproof both new and existing swimming pools with a finish that will last 20 years or more; there is definitely a market of consumers who don’t want to have to repaint, replaster or change their pool liner out in 10 years to less—for them, this product is the ideal solution,” says Hohne.

Brighton Pools sees that reinforced PVC membrane is a waterproofing pool finish that works for both new pool constructions as well as renovation. “Consumers are savvy and many of them would prefer not to have to replace their vinyl pool liner every 10 years or need to replaster or re-paint their pool,” says Hohne. “These consumers are willing to pay more for a reinforced PVC membrane that will last more than 20 + years and we realized this and decided that we wanted to start offering reinforced PVC for residential pools and it has been highly successful.” One of the other reasons that Hohne’s company decided to add reinforced PVC to his offering is that it is the ideal solution for renovating all types of pools. Not only for repair and renovation but also as a complete waterproofing solution. “Whether we get a call to renovate a deteriorated gunite pool, or a plaster finish pool or a traditional vinyl liner, we offer reinforced PVC membrane because we know the reinforced PVC membrane will provide a complete waterproofing solution,” says Hohne. “We also know that these pool owners are likely looking for a long-term solution and are willing to pay for a reinforced membrane so they don’t need to deal with cracked or crumbling pool walls, peeling paint, falling tiles etc.” In fact, Hohne says that every quote they provide always includes a line for reinforced PVC membrane as an option because so many people are now opting for this more permanent solution. Hohne is continuing to expand franchise operations throughout the country and he knows that reinforced PVC membranes are an important part of the company’s growth. “As more and more people are trained to install reinforced PVC membranes, the more we will see reinforced PVC membranes catching up to their level of popularity in Europe.”

Design Trends Are Catching Up to the Material

Importantly, pool design itself is changing. Modern residential pools in North America —particularly in architecturally progressive markets like Miami, Austin, and Los Angeles — are starting to follow European-influenced trends: minimalism, linear geometry, clean edges, and symmetry.

These modern forms are ideally suited for reinforced PVC membranes, which are easier to fabricate and install in rectilinear or predictable geometries. As more homeowners seek out elegant, modern pools with lower maintenance, the case for reinforced PVC membranes becomes even more compelling.

For example, Plunge pools are a category of pool that has grown exponentially in recent years. And because of their shape and size, they lend themselves perfectly to reinforced PVC membrane. Bob Hobaica, owner of Plunge+ pools (part of Easton Select Group) honed-in on reinforced PVC as a superior, waterproofing interior for their plunge pool. “I had read several articles about reinforced PVC for use in pools over the past few years and talked to installers who actively use this finish in commercial pools,” explains Hobaica. “So when RENOLIT approached me, I was receptive to learning if this waterproofing pool interior solution would work for the Plunge+ pool.” Now Plunge+ pools are constructed using reinforced PVC membrane as its method of waterproofing and finishing the pool. “RENOLIT initially came out and trained our construction crew on how to install reinforced PVC,” explains Hobaica. “There is a bit of a learning curve to the installation. However, we were all super impressed with the durability and practicality of the product, not to mention that the company’s new TOUCH textures and colors are very attractive to consumers.”

In short: the market is finally catching up to the material.

Looking Forward: A Bright Future for Reinforced PVC in North America

The next decade will likely see a major shift in how North American pools are waterproofed and finished. The demand for durable, low-maintenance, and high-performance materials is rising. The industry’s younger generation is more open to physics-driven construction. And modern pool shapes are opening the door for solutions that weren’t viable in decades past.

Reinforced PVC membranes — with their 40+ years of proven performance across Europe, commercial installations, and high-end projects — are finally finding their place in the North American residential market.

As the focus moves from simply building pools to engineering them properly, reinforced membranes are not just an option — they’re part of the future.

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New Poolsafe Removable Mesh Safety Fences

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poolsafe-mesh-safety-fence

Poolsafe LLC, offers new mesh, removable safety fencing designed to be installed around any pool shape or size. Uses patented, transparent, large-hole ClearGuard™ Mesh for better visibility into the pool area, while also blending the fence into backyard. Lockable, self-closing Triton™ gate features a curved top bar to help prevent climbing. Unique Tri-Pod Truss system keeps gate aligned with daily usage. Available in 4ft and 5ft heights, in black, brown, beige, or gray colors. 

https://poolsafe.com/
(888) 489-2282

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RicoRock® Offers New Temple Stone Firepit

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ricorock-temple-stone-firepit

The newest addition to the Temple Stone series, this new firepit is made of attractive and safe pre-cast lightweight concrete that matches the latest in outdoor living décor. Roughly 18”-inches high, 76” long and 23” wide, the Temple Stone firepit makes it easy to create a gathering space in any backyard.  Hooks up to standard propane tanks.  Shown in limestone color.  Made in USA and available for immediate shipment.

www.ricorock.com or call (888) 717-3100.

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