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Salinization Technology Artificially Recreates Ocean Water and Allows Hundreds of Marine Species to Survive Away from the Brazilian Coast
An uncommon technical operation in Brazil draws attention in the interior of Paraná.
The AquaFoz, an aquarium located in Foz do Iguaçu, developed a system capable of transforming freshwater into saltwater to keep marine species alive hundreds of kilometers from the sea.
To achieve this, the structure utilizes special sea salt imported from Israel, a key element to replicate the chemical composition of ocean water inside the tanks.
Since the start of operations, inaugurated in November 2025, the project has already produced around 3.5 million liters of saltwater.
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To reach this volume, approximately 80 tons of salt were used, with an investment exceeding R$ 500,000, according to information released by the aquarium’s management.
Precise Chemical Composition Ensures Water Stability
The choice of salt used in the process is not random.
According to Rafael Santos, chief biologist of AquaFoz, the structure depends on a product with an extremely balanced chemical composition.
This special salt contains essential minerals found in the ocean, such as sodium, chloride, magnesium, and calcium.
These elements ensure appropriate salinity and chemical stability, factors essential for the survival of marine species.
Moreover, common salts available in the Brazilian market do not have the same mineral balance.
For this reason, importing became the safest technical alternative to keep the system running correctly.
Technical Process Transforms Freshwater into Marine Environment
The system’s operation begins with complete treatment of the freshwater used in the tanks.
After filtration, the imported salt is dissolved in a controlled manner until specific salinity levels are reached.
At this moment, various parameters are continuously monitored.
Among the main indicators monitored by the technical team are:
• water salinity
• pH level
• tank temperature
• chemical hardness
This constant monitoring ensures that the environment accurately reproduces conditions similar to those found in the ocean.
Thus, even hundreds of kilometers from the coast, the animals can live in a stable environment.
Daily Maintenance Requires Specialized Technical Work
The operation of the aquarium also depends on an intense maintenance routine.
Handlers and divers carry out daily activities inside the tanks to keep the system balanced.
These professionals clean surfaces, remove waste, and monitor the feeding of the species.
At the same time, technical teams monitor equipment responsible for water circulation and filtration.
Pumps, compressors, and oxygenation systems must operate 24 hours a day, ensuring that the water maintains a constant quality.
At the beginning of operations, salt consumption was higher, as all tanks needed to be completely filled.
Structure Houses Hundreds of Aquatic Species
Currently, AquaFoz houses around 300 aquatic species.
Among them, over 120 species are marine, dependent on environments with controlled salinity.
Additionally, to maintain this stability, approximately 20% to 30% of the tank water volume is renewed monthly.
Thus, this process helps preserve water quality and the health of the animals.
At the same time, in addition to tourist visitation, the aquarium also works in environmental education and scientific dissemination, expanding knowledge about aquatic biodiversity.
Technology Allows for Creating an Artificial Ocean in the Interior of Brazil
Thus, the structure of AquaFoz demonstrates how technology, biology, and environmental engineering can work together to recreate complex natural environments.
Even distant from the coast, the aquarium can replicate conditions similar to those of the ocean.
In this way, this model shows that marine environments can be technically simulated with precision when there is strict control over chemical composition, temperature, and water circulation.
Therefore, by importing sea salt and transforming freshwater into a controlled oceanic environment, the aquarium creates a solution that allows for the preservation and presentation of marine species in the interior of the country.
To what extent can artificial systems like this transform how aquariums and scientific centers reproduce marine environments in the future?
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