In the world of self-sufficient irrigation, ollas (clay pots) are the classic choice. At tontau, we greatly appreciate this traditional method for small, individual applications. However, if you want to water your entire garden efficiently and stress-free, conventional ollas quickly reach their physical and practical limits.
Here is the scientific analysis of why the tontau system is the evolution of clay irrigation.
1. The problem with conventional ollas: the “pressure effect”
Many conventional ollas have a wall thickness of only about 3 mm. What sounds efficient at first often negates physical self-regulation in practice.
The physical evaluation
According to Darcy's law, the flow rate Q is inversely proportional to the wall thickness l:
Scientific studies show:
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Sensitivity: Even a change in wall thickness of only ±1 mm can alter the seepage rate by 5% to 20%.
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Loss of control: With very thin walls (such as the ±3 mm often seen), hydrostatic pressure (the weight of the water in the pot) dominates over the suction tension of the soil.
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The result: The water “pushes” out uncontrollably instead of waiting for the plant's actual needs. The important self-regulation hardly takes place anymore.
The difference with tontau: Our systems work with optimized wall thicknesses (based on scientific standards of 7 to 10 mm), which ensure that the capillary forces of the soil remain in control.
2. Space consumption: Reservoir vs. root space
A dilemma with classic ollas: If you want to bridge a week's vacation, the olla has to be huge. This takes up valuable space in the bed that your plants actually need for their roots.
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Olla: The reservoir is built into the bed. Large volume = large space requirement.
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tontau system: We use the knowledge that the storage component inside the clay body becomes irrelevant as soon as a central tank is connected.
The key feature: we simply store the water reservoir in the rain barrel. The tontau units in the bed are compact and efficient, while the actual water volume is outside the bed. This leaves the space where it belongs: with your plants.
3. From a single unit to an intelligent network
Ollas are “soloists.” When an olla is empty, you have to refill it manually. With 20 ollas in the garden, this is a tedious task.
tontau is a modular system:
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Networking: tontau units are connected via hoses to form a complex network.
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Individual design: Whether you have a raised bed, a winding perennial bed, or a greenhouse, the system can be customized to suit your garden.
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Automation: Once connected to the rain barrel, the system supplies itself. The tedious manual filling of individual pots is completely eliminated. Imagine you have a large 4000L IBC.
|
Feature |
Conventional olla or pitcher |
tontau system |
|
Wall thickness |
Often too thin (~3 mm) |
Optimized for self-regulation (>7 mm) |
|
Control |
Hydrostatic pressure prevails |
True self-regulation through suction tension |
|
Space in the bed |
High (water storage in the bed) |
Minimal (external storage) |
|
Maintenance |
Manual filling of each unit |
Central filling via tank/barrel |
Conclusion
Ollas are a nice introduction for balcony boxes. However, if you are looking for a long-term, space-saving, and truly needs-based supply for your beds, there is no way around this system solution. With tontau, you can bring the precision of science to your garden.
Would you like to see how easy it is to set up a tontau system? Take a look at our step-by-step installation guide.
