Aquaculture
Technology
Farmer support
20.09.2024
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Aquaculture in Ponds - Aller Aqua presents the Tank by Pond Manual for intensive farming

Traditional pond farming has reached its maximum capacity in many regions. With farmers achieving 5-10 tons per hectare in smaller ponds, using aeration and high-quality extruded feed, further intensification faces limitations. Constraints such as limited land availability, water scarcity, and environmental regulations are challenging the expansion of aquaculture. As a result, growth in this sector cannot rely solely on the construction of new ponds.

The Role of New Technologies in Aquaculture

Despite these challenges, ponds hold great potential for the adoption of new technologies that can increase productivity without putting additional strain on natural resources. To support sustainable growth, it is vital to introduce innovative systems that complement existing practices, rather than replacing them. These technologies allow for the intensification of aquaculture in a way that harmonizes with the natural environment.

Introducing the Tank By Pond (TBP) System

The Tank By Pond (TBP) system, developed by G2O d.o.o. in Slovenia between 2018 and 2024, offers a breakthrough approach to pond-based aquaculture. Inspired by the "Pond in Pond" principle, TBP enables the super-intensive farming of warm-water fish by integrating tanks and ponds into a synergistic whole. In this system, ponds perform the mechanical and biological filtration typically handled by advanced filtration units in Recirculating Aquaculture Systems (RAS). However, TBP stands out by being more robust, easier to build, and more cost-efficient in terms of both capital and operational expenses.

Practical Insights from G2O’s Experience

G2O brings extensive hands-on experience in breeding cyprinids, trout, and African catfish using both ponds and RAS systems. With over 70 successful projects across 7 countries, the Slovenian company have developed innovative, practical solutions that go beyond conventional carp farming methods. The knowledge they share comes directly from their own farm operations, providing tested and reliable insights into the potential of the TBP system.

Scaling Global Aquaculture with Local Insights

Although the data and techniques outlined in this manual come from experiences in Slovenia, we believe they can be adapted for global use, as they system is already being constructed in many other places worldwide, for instance Uzbekistan and Croatia. Aller Aqua's goal is to share this knowledge to empower farmers with the tools and understanding needed to thrive in the evolving world of fish farming.


By embracing innovation and sharing practical knowledge, we aim to help fish farmers worldwide maximize their productivity, all while reducing the environmental footprint and ensuring the sustainability of aquaculture for future generations.

Danijel Gospic has lived close to the family fish farm since 1980, Aquaculture is his and his family's lifestyle. After graduating from the Veterinary Faculty in Zagreb, Danijel completed scientific postgraduate study of biomedicine in Ljubljana. He is the president of the Slovenian Aquaculture Association, President of the board for aquaculture development in Slovenia and co-owner (with his brother) of the G2O Company Ltd. Danijel has been fully involved in aquaculture since 2010.

G2O Ltd

The founders of the company are Ninoslav and Daniel Gospic, who grew up next to a fish farm where they still live today.

G2O activities are divided in own fish farming, consultancy and RAS design. At this moment, G2O owns: superintensive carp farm, trout RAS and African catfish RAS. Production capacity of G2O is about 400 t/y, with total water uptake 13 l/s. This production presents 30 % of total Slovenian Aquaculture, with 0,1 % of total water uptake of Slovenian aquaculture. All 3 farms are designed, built and operated by the G2O Company. Solutions are innovative, unique and applied in more than 70 projects on the global level.

1. What is the current state of intensive pond farming?

Intensive pond farming has reached its maximum capacity in many areas, with typical production reaching 5-10 tons per hectare. This is particularly true in Slovenia and other regions with similar climatic conditions. Further intensification of traditional pond systems is limited by land availability, water scarcity, economic inefficiencies, and environmental regulations.

2. Why is building new ponds not a viable option for further aquaculture growth?

Building new ponds is increasingly challenging due to limited available land, water shortages, high costs, and environmental protection regulations. Expanding aquaculture will need to focus on optimizing existing pond systems and integrating new technologies, rather than relying solely on creating more ponds.

3. What potential do ponds hold for future aquaculture?

Despite the limitations, ponds have great potential when integrated with modern technologies. These new technologies can intensify production without increasing the demand for natural resources, providing a more sustainable approach to aquaculture.

4. What is the Tank By Pond (TBP) system?

The Tank By Pond (TBP) system is a super-intensive fish farming solution developed by G2O d.o.o. (Slovenia) between 2018 and 2024. It synergistically combines tanks and ponds, allowing for the intensive breeding of warm-water fish. The pond in this system performs mechanical and biological filtration, reducing the need for complex filtration systems.

5. How does the TBP system compare to traditional Recirculating Aquaculture Systems (RAS)?

While the TBP system functions similarly to a RAS, it is simpler, more robust, and easier to implement. It requires less capital (CAPEX) and operational expenses (OPEX) compared to traditional RAS, making it a more economically efficient option for super-intensive fish farming.

6. What species can be farmed using the TBP system?

The TBP system supports the farming of warm-water fish species, particularly cyprinids in ponds. G2O d.o.o. also farms trout and African catfish using RAS systems, and the technical solutions from these systems have influenced the TBP system’s design.

7. Is the TBP system tested and proven?

Yes, the TBP system is based on practical experience from G2O’s fish farms. While the data has not been scientifically evaluated, the system has been tested in real-world conditions, delivering proven results on the company’s own farms.

8. Can the TBP system be applied globally?

Yes, although the system was developed in Slovenia, the experiences gained from implementing the TBP system are believed to be adaptable globally. Modifications may be required for local conditions, but the system’s principles can apply across various regions.

9. What are the economic advantages of the TBP system?

The TBP system offers significant cost advantages over traditional RAS. It is less expensive to build and operate while still providing high efficiency in terms of fish production. This makes it a highly attractive option for fish farmers looking to intensify production with lower investment.

10. What role does the pond play in the TBP system?

In the TBP system, the pond takes over the role of mechanical and biological filtration, typically performed by filtration units in traditional RAS. This natural filtration reduces system complexity and operational costs, while still providing the necessary water quality for super-intensive fish farming.