{"id":62280,"date":"2026-02-11T16:40:02","date_gmt":"2026-02-11T15:40:02","guid":{"rendered":"https:\/\/www.fluidra.com\/?post_type=new&p=62280"},"modified":"2026-02-11T16:40:03","modified_gmt":"2026-02-11T15:40:03","slug":"natural-swimming-pools","status":"publish","type":"new","link":"https:\/\/www.fluidra.com\/ca\/solucions-comercials\/inspiracio\/bloc\/natural-swimming-pools\/","title":{"rendered":"Natural swimming pools: what they are and why commercial facilities are choosing them"},"content":{"rendered":"\n

What is a natural swimming pool?<\/strong><\/h2>\n\n\n\n

A natural swimming pool<\/strong> is a chemical-free<\/strong> swimming facility that uses biological filtration<\/strong>\u2014through plants, microorganisms, or both\u2014to purify water naturally. The pool consists of two distinct zones: the swimming zone<\/strong> where people swim, and the regeneration zone<\/strong> where biological cleaning happens. Water continuously circulates between these areas, getting naturally purified.<\/p>\n\n\n\n

There are two main approaches. Traditional designs use aquatic plants<\/strong> that filter nutrients<\/strong> while adding oxygen<\/strong>. Modern systems use a biofilm filter<\/strong>\u2014a compact system where beneficial microorganisms<\/strong> do the cleaning work without plants. Both approaches meet or exceed health and safety standards<\/a> while eliminating harsh chemicals.<\/p>\n\n\n\n

The concept originated in Austria in the 1980s and is now increasingly common in hotels, wellness facilities<\/a>, and private pools worldwide.<\/p>\n\n\n\n

How do natural swimming pools work?<\/strong><\/h2>\n\n\n\n

Natural swimming pools<\/strong> rely on biological filtration<\/strong>\u2014beneficial microorganisms<\/strong> and sometimes plants work together to remove contaminants and balance nutrients<\/strong>. The system operates as a closed-loop<\/strong> with continuous circulation.<\/p>\n\n\n\n

A pump<\/strong> moves water from the swimming zone to the filtration zone, where it gets cleaned, then returns. This constant water circulation<\/strong> prevents stagnation and ensures mosquitoes<\/strong> can’t breed.<\/p>\n\n\n\n

Beneficial microorganisms form biofilms<\/strong> that consume organic matter<\/strong>, break down nutrients and outcompete harmful bacteria. Good bacteria consume nutrients that would feed algae<\/strong>, while oxygen levels<\/strong> stay healthy through water movement and photosynthesis<\/strong> (in plant-based systems).<\/p>\n\n\n\n

Many natural swimming pools also includemechanical filters and phosphate dosing<\/strong> for greater control of water quality. Some even include disinfection with UV-C rays<\/strong><\/a> and\/or low-salt hydrolysis to destroy unwanted bacteria suspended in the water, taking the clarity of natural swimming pool water to the next level.<\/p>\n\n\n\n

What is a biofilm filter and how does it differ from plant-based systems?<\/strong><\/h3>\n\n\n\n

A biofilm filter<\/strong> is a plant-free system where microorganisms<\/strong> do all cleaning work. Water flows through a chamber containing filter media<\/strong> (gravel, ceramic or plastic elements). Beneficial bacteria colonize these surfaces, forming a biofilm that processes contaminants.<\/p>\n\n\n\n

Key advantages: smaller footprint<\/strong> (filter fits under a deck vs. plant zones requiring 30-50% of pool area), faster water circulation<\/strong>, and ideal for commercial applications<\/strong> with higher bather loads<\/strong>.<\/p>\n\n\n\n

Comparison: Plant-based vs Biofilm Systems<\/strong><\/p>\n\n\n\n

Aspect<\/strong><\/td>Plant-Based System<\/strong><\/td>Biofilm System<\/strong><\/td><\/tr>
Space Required<\/strong><\/td>30-50% of pool area<\/td>Compact filter (<5% of pool area)<\/td><\/tr>
Aesthetic<\/strong><\/td>Natural, pond-like<\/td>Contemporary, modern designs<\/td><\/tr>
Maintenance<\/strong><\/td>Plant care, trimming<\/td>Equipment maintenance<\/td><\/tr>
Best For<\/strong><\/td>Resort settings<\/td>Urban hotels, rooftop pools<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What are the design options for natural swimming pools?<\/strong><\/h2>\n\n\n\n

Natural swimming pools<\/strong> offer remarkable design flexibility<\/strong>\u2014from organic, naturalistic designs<\/strong> to sleek contemporary installations<\/strong>. With biofilm systems, pools can appear completely conventional (rectangular, L-shaped, infinity edge) while operating on natural principles.<\/p>\n\n\n\n

Sizes range from intimate plunge pools<\/a> (minimum 30 square meters<\/strong>) to large-sized leisure and swimming installations. Indoor installations<\/strong> are popular in wellness centers<\/a>, offering year-round chemical-free swimming.<\/p>\n\n\n\n

\"design<\/figure>\n\n\n\n

Why are hotels and commercial facilities choosing natural swimming pools?<\/strong><\/h2>\n\n\n\n

Natural swimming pools<\/strong> deliver strategic benefits: marketing differentiation<\/strong>, operational savings<\/strong>, guest wellness<\/strong> and sustainability credentials<\/strong>.<\/p>\n\n\n\n

Swimmers report natural pool water feels softer on skin and eyes\u2014no chemical smell, stinging, or dry skin. This aligns perfectly with wellness center positioning<\/a>.<\/p>\n\n\n\n

While initial costs run 20-40% higher than conventional construction<\/a>, operating costs<\/strong> drop 30-50% over the pool’s lifetime. You eliminate chemical purchases, reduce water consumption, and benefit from lower energy costs.<\/p>\n\n\n\n

Hotels can command premium rates for rooms with natural pool access. The pool becomes part of the facility’s brand story<\/strong> and sustainability commitment.<\/p>\n\n\n\n

How much does a natural swimming pool cost?<\/strong><\/h2>\n\n\n\n

Natural swimming pools<\/strong> cost 20-40% more<\/strong> to install but recoup this within 3-5 years through operational savings<\/strong>.<\/p>\n\n\n\n

For commercial pools (100-150 m\u00b2), expect \u20ac70,000-\u20ac150,000<\/strong> installation. Variables include design complexity, filtration system choice, and site conditions.<\/p>\n\n\n\n

Operating costs compared to conventional pools<\/strong><\/h3>\n\n\n\n

Operating costs<\/strong> run 30-50% lower<\/strong>: \u20ac2,000-\u20ac4,000 annually vs. \u20ac4,000-\u20ac8,000 for conventional pools.<\/p>\n\n\n\n

Savings breakdown:<\/strong><\/p>\n\n\n\n