Natural Pool: What Is It, Benefits, and Costs Explained

What is a Natural Pool?

Natural pools, sometimes called swimming ponds or biotop pools, are exactly what they sound like—pools that mimic the natural environment.

They’re designed to provide a swimming experience that’s free of chemicals and uses natural processes like plants and microorganisms to filter and clean the water. Forget the green muddy icky ponds. Think of them as a pond you can swim in, but with crystal-clear water and a beautiful, eco-friendly design.

In Northern Europe, for example, natural pools are widely popular and are designed with an 80/20 ratio—80% of the pool dedicated to a regeneration zone filled with plants, and 20% for swimming.

This design allows nature to take over and balance the water’s biology naturally. However, not all natural pools follow this exact ratio. In fact, there are many variations, like our own system at Oásis Biosistema. We create pools that are not quite ponds and not exactly like other natural pools either—something truly in between!

How Our Natural Pools Differ

Traditional ponds usually lack filtration systems; they rely solely on plants and fish, which means they often appear dark or murky. While these may work for garden aesthetics, they don’t provide the clean, inviting look most people want for swimming. 

On the other hand, standard natural pools, like those seen in Germany and the Netherlands, lean heavily on plants for filtration. This is effective but can limit swimming space and doesn’t always ensure crystal-clear water.

Our approach bridges the gap. Our natural pools integrate plants and fish for biological balance, but we go a step further. We add a sophisticated filtration system called the sump.

Here’s how it works: water flows into the sump by gravity, passing through multiple “boxes” filled with materials like Japanese blankets and brushes that filter debris. Once it’s clean, the water is pumped back into the pool via multiple outlets to ensure optimal circulation..

But we don’t stop there. Our system also includes UV light and ozone sterilization, offering additional layers of water purification. UV lights target free-flowing algae, destroying their DNA and preventing their growth. Meanwhile, ozone treatments enhance water quality by breaking down organic waste, reducing the need for harsh chemical treatments  . The result? Clear, sparkling water that’s entirely safe for swimming.

Benefits of a Natural Pool

Why settle for the same old chlorine-scented splash zone when you could have a swimming sanctuary instead? 

Natural pools aren’t just a pretty face (though they’re really pretty)—they come with a whole array of perks that traditional pools simply can’t match. Imagine swapping red eyes and itchy skin for clear, fresh water that feels like a dip in your own private lake. 

And the best part? Your pool could become the hottest spot in town for birds, butterflies, and all sorts of wildlife. Ready to find out why a natural pool might be your new best friend? Let’s break down the benefits.

Health Benefits

No exposure to chlorine or other chemicals means fewer skin irritations, no red eyes, and an overall healthier swimming experience.

Environmental Impact

Natural pools support biodiversity. They attract and sustain wildlife, like birds and insects, creating a mini-ecosystem in your backyard. Plus, without the use of chemicals, these pools are much more sustainable and eco-friendly.

Aesthetic Appeal

A natural pool integrates seamlessly with the landscape, becoming a visual extension of your garden. Imagine a pool framed by plants, rocks, and even small waterfalls—every element working together to create a tranquil retreat.

Long-term Investment

While the upfront costs may be higher, the absence of chemical treatments and the self-sustaining nature of these pools often lead to lower maintenance costs over time. Plus, a natural pool can increase property value, making it not just a pleasure but a smart investment too.

How Much Does a Natural Pool Cost?

Let’s talk numbers. Natural pools generally have a higher initial setup cost than traditional pools, but the long-term benefits often outweigh these expenses. Here’s what to expect.

Initial Construction Costs

A natural pool can cost anywhere from 50,000€ to over $100,000€, depending on size, complexity, and customization. Adding features like a waterfall, custom stonework, or specialized plants can increase costs but also enhance the overall aesthetic.

Factors Affecting Costs

• Size: Larger pools naturally cost more due to the amount of excavation and materials needed.
• Materials: Using natural stone for the pool’s structure and regeneration zones can add to the price but provides a timeless, natural look.
• Landscaping: Adding diverse plants, a variety of fish, and decorative elements to mimic a true ecosystem also impacts the total cost.

Maintenance Costs

The good news? Once established, natural pools generally cost less to maintain than traditional ones. You can expect to spend around 1,000€ – 3,000€ annually, depending on your setup and whether you choose additional filtration technologies like ozone or UV.