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Problem: Manual watering or simple ollas are often not sufficient for long periods of absence.
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Solution: A tontau system uses the principle of self-regulation.
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Advantage: The reservoir is stored in the rain barrel, maximizing space in the garden bed.
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Efficiency: Saves up to 70% water and drastically reduces the risk of crop failure.
Summer vacation is coming up, but worries about your tomatoes drying up are dampening your anticipation? If you don't want to rely on vulnerable computer controls or helpful neighbors, you need a system that works physically self-sufficiently. While conventional ollas (clay pots) are often empty after a few days, the tontau system offers a solution that lasts for weeks.
1. The science of self-regulation: Why tontau "thinks for itself"
A tontau system is more than just a container of water; it is a self-regulating emitter. The water seeps through the unglazed walls directly into the root zone.
The key point for vacations: the release rate is controlled by the suction tension of the soil.
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If the soil is dry due to heat, the suction tension increases and more water is released.
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In cooler weather or rain, the demand automatically decreases.
This interaction with the environment has been scientifically proven: the seepage rates correlate significantly with evaporation (pan evaporation). This ensures that not a single drop of water is wasted while you're lying on the beach.
2. The tontau advantage: reservoir in the barrel, space in the bed
Traditional ollas have a problem: to bridge a 3-week gap, they would have to be gigantic. This robs the plants of valuable root space in the bed.
The tontau system solves the storage problem:
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Central reservoir: Instead of burying the storage in the bed, we use an external source, such as a rain barrel.
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Permanent supply: The clay bodies in the bed act purely as emitters, while the storage capacity is determined by the size of your barrel.
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Space saving: Your plants retain the full space for their root growth while being fed via a slim hose system.
3. Wall thickness: Why precision determines survival
Many cheap ollas have wall thicknesses of only about 3 mm. However, science shows that wall thickness has an extremely sensitive effect on the seepage rate. A change of only 1 mm can alter water delivery by 5% to 20%.
If the walls are too thin, hydrostatic pressure (the weight of the water itself) dominates. The water "pushes" out uncontrollably instead of flowing as needed. tontau systems are designed with optimized wall thicknesses (> 7 mm) to ensure true physical self-regulation.
4. Sample calculation for your vacation
How much water do you really need? A comparative measurement showed seepage rates of approx. 1.7 liters per day in a state of equilibrium for an average tontau unit.
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n = number of tontaus
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qDay = seepage rate per day (~1.7 L)
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d = days of absence
For 10 tontaus and a 21-day vacation, you will need a reservoir of approximately 357 liters.
Conclusion: Carefree vacation
Simple ollas are great for a weekend getaway. However, for true independence in the summer, a tontau system is necessary. It uses the pure physics of the soil, saves up to 70% water, and ensures healthy growth while you enjoy your free time.
