Natural swimming pool filtration systems offer an eco-friendly alternative to traditional pool cleaning methods, using plants and biological filters to keep the water fresh and clear. When building your DIY natural swimming pool, consider creating a separate swimming and water purification area for optimal filtration.
With the right combination of plants, water movement, and filter materials, you can create a safe and enjoyable swimming environment that relies on nature’s cleansing mechanisms. Exploring these systems can be rewarding and cost-effective, providing a unique and environmentally friendly pool experience.
Understanding Natural Pool Filtration
Natural swimming pool filtration systems offer an eco-friendly way to maintain crystal-clear water in your pool without harsh chemicals. Let’s explore the benefits and key components of a natural filtration system for your DIY project.
Benefits of a Natural Filtration System
A natural filtration system offers several advantages over traditional swimming pool systems, such as:
- Elimination of chlorine and other chemicals, ensuring a healthier environment for swimming
- Lower maintenance costs, as you won’t need to purchase and apply chemicals regularly
- Increased biodiversity, promoting a thriving ecosystem with aquatic plants and beneficial organisms
- An aesthetically pleasing, natural look and feel that blends seamlessly with landscaping and gardens.
Key Components of a Natural Filtration System
To build a successful natural swimming pool filtration system, you need several essential components:
Swimming Zone: This is where you’ll swim, separated from the filtration area by a wall or barrier. Make sure to size your pool accordingly for your swimming needs.
Plant Zone: Adjacent to the swimming zone, this area contains plants that act as a natural filter for water, removing impurities and unwanted organic material. The water moves continuously between the swimming and plant zones, as described by HGTV.
Water Circulation System: A water pump or skimmer system is required to keep the water in motion, facilitating the filtration process and preventing stagnation. WikiHow recommends placing a small water pump at the pool’s far end.
Biological Filters: Microorganisms concentrated on the root systems of plants in the plant zone help to break down contaminants and excess nutrients, providing additional water purification, according to Ecohome.
Now that you understand the benefits and key components of a natural swimming pool filtration system, you’re better equipped to create an eco-friendly, attractive pool in your backyard.
DIY Natural Swimming Pool Filtration System
Creating a DIY natural swimming pool filtration system involves:
- Selecting suitable plants.
- Designing the filtration zone.
- Creating a biofilter.
- Integrating skimmers and pumps.
Follow these steps to ensure a clean and eco-friendly swimming pool:
1. Selecting the Right Plants
Choose aquatic plants to purify your pool’s water. These plants are essential in absorbing excess nutrients and aiding in natural filtration. Opt for a mix of submerged plants, floating plants, and marginal plants that grow along the water’s edge for a balanced ecosystem. Examples include water lilies, duckweed, and water hyacinth. Consider the climate and native species to ensure they thrive all year round.

2. Designing the Filtration Zone
Establish a separate area for water purification, the regeneration zone. This zone should occupy about 30% to 50% of the pool area. The filtration zone incorporates aquatic plants, soil, and gravel. Make sure to create a gentle slope between the swimming and regeneration zones to allow for easy water circulation.
3. Creating the Biofilter
Use a biofilter of natural materials like shale or lava stones to help maintain water quality. This filter breaks down organic waste and absorbs phosphates, which can lead to algae growth. Place it near the skimmer or pump to maximize efficiency. Ensure the biofilter is large enough to handle the volume of water in your pool.

4. Integrating Skimmers and Pumps
Install a small water pump and skimmer to maintain water circulation and remove debris. The pump should be placed at the pool’s far end to direct water toward the plants, which helps in the natural filtration process. Integrate a skimmer to remove leaves, bugs, and other debris from the water, ensuring a clean swimming environment. Pay attention to energy-efficient pumps to minimize the environmental impact and operational costs.

Related: Pool Skimmers, Best Pool Filter Sand, Why Is a Pool Filter Essential
Maintenance and Troubleshooting
Regular Maintenance Tips
To keep your DIY natural swimming pool filtration system functioning efficiently, follow these regular maintenance tips:
- Ensure continuous water circulation for the plants’ roots to cleanse the pool1.
- Reserve 50% of the pool surface area for shallow plants to create a self-sustaining ecosystem and eliminate the need for an expensive filter or chlorine2.
- Maintain overall water quality by monitoring pH levels and removing debris.
- Regularly tend to your garden, as it plays a crucial role in the pool’s filtration system.
Common Problems and Solutions
Despite regular maintenance, issues may arise. Here are some common problems and their solutions:
- Dirt blowing back into the pool: After backwashing, use the multiport valve. Rinse setting for 20 seconds to remove any remaining dust. A small amount of fine, silty dirt passing through for sand filters may be considered normal.
- Filter cleaning or backwashing too often: A new filter may last 30 days or longer between cleanings. If cleaning or backwashing too frequently, inspect the filter for damage or debris buildup.
- Air in the system: To prevent air buildup within the filtration system, open the air bleeder and all return lines before restarting the pump.
By adhering to these regular maintenance tips and troubleshooting common issues, your DIY natural swimming pool filtration system will remain healthy and efficient.
Safety Precautions and Considerations
Securing the Pool Area
When building a DIY natural swimming pool, it is essential to keep safety in mind. One critical step is securing the pool area. Installing a fence around the pool is highly recommended to prevent unauthorized access or accidents. Ensure the fence is four feet high, with a self-closing and self-latching gate (HGTV).

Another option is using pool alarms or motion detectors, which provide an additional layer of security. This measure notifies you when someone enters the pool area, allowing you to respond quickly to potential safety issues.
Ensuring Clear and Safe Water
Keeping your natural swimming pool’s water clean and safe is vital for your health and enjoyment. You’ll need a proper filtration and circulation system for biological and mechanical methods (Pool Research).
Choosing the right plants is crucial, as they play a significant role in water purification. Aquatic plants in the pool’s designated vegetation area will aid in removing impurities from the water. Additionally, water circulation helps prevent the buildup of algae and bacteria (Ecohome).
Continuous water circulation should be maintained for effective filtration. Sometimes, you may also need to clean your pool using a vacuum, brush, or net skimmer. This extra effort will ensure your pool water remains clear and safe for swimming (Pool Research).
In conclusion, diving into DIY natural swimming pool filtration is like a refreshing dip into crystal clear waters. With this eco-friendly solution, you can enjoy a healthier and more sustainable swimming experience without sacrificing water quality.
The critical components of a natural filtration system include a swimming zone, plant zone, water circulation system, and biological filters, all of which work together to create a harmonious balance in your pool.
Whether you’re a seasoned swimmer or just starting, this DIY project is a unique and rewarding experience that brings the beauty of nature into your backyard. So why wait?
Let’s dive in and create a breathtakingly clear swimming pool that relies on the power of Mother Nature!