RAS for fish: a ready-made system for trout, char, tilapia and catfish

Modern aquaculture equipment opens up new opportunities for the efficient cultivation of various types of fish. We offer a ready-made closed water supply system (CWS) for fish farming. This system is ideal for commercial fish farming with minimal water, energy and maintenance costs.

Main features of our closed water system for fish:

• The complex includes three pools with a volume of 5 cubic metres each. The diameter of the pool is 2.4 metres and the height is 1.2 metres. This configuration provides an optimal environment for rearing a large number of fish with a compact equipment layout.
• To maintain water purity, a CrawTec drum filter is used, designed for a capacity of up to 45 cubic metres of water per hour. It effectively retains solid particles, reducing the load on other elements of the filtration system.
• Biological filtration is represented by the CrawTec BF-9 filter, which has been upgraded to suit the specifics of this particular water treatment plant. It comes with a unique bio-loading agent that helps break down ammonia and nitrite with beneficial bacteria.
• The pumping part includes one energy-saving centrifugal pump with power control. This allows maintaining a stable hydrodynamic regime in the system and efficiently servicing all elements of the CCS.
• The degassing system is based on a compact degasser with bioblocks. It removes excess carbon dioxide, which improves water quality and provides better conditions for fish growth and aerates the water.
• Water purification is also provided by a 180-watt UV steriliser. It disinfects the water, reducing the risk of spreading fish diseases.
• To maintain the required oxygen level, the system is equipped with a high-performance blower. The kit also includes a set of diffusers with laser perforated holes to ensure even oxygen saturation of the water.
• The bio-loading kit allows you to quickly start the biofiltration process and maintain a stable biological balance in the water.

The maximum loading of the system at one time (during the growing process):

• approx. 1000 kg of rainbow trout;
• about 1100 kg of European char or 1200 kg of Arctic char;
• about 1500 kg of tilapia;
• about 4,320 kg of African catfish.

This means that at least two full turnovers of each type of fish can be made per year, which ensures a stable and profitable business. This potential allows you to plan for scaling up production or work on the principle of regular supplies of fresh fish for the retail or wholesale market.
The system can also be used as an overstocking facility. In this case, the maximum instantaneous biomass of fish in the CCS can be at least 1.5-2 times higher. 

Advantages of CrawTec's RAS system

Compactness and high performance. The system takes up a minimum of space and allows you to grow large volumes of fish.

Energy efficiency. Thanks to modern pumps and filters, electricity costs are significantly reduced.

Reliability. All components are made of high quality materials and are designed for long-term operation.

Complete set. The set includes everything you need for quick start-up and stable operation of the farm.

Features of the set:

• High-quality pools made of durable material - food grade polypropylene;
• Reliable CrawTec drum and biological filters;
• Powerful UV steriliser;
• Effective water aeration system;
• Bio-loading kit for stable biofiltration.
• A set of pipelines, taps and fittings.
• Metal frames and stands.

The system can be used both to start a new business and to expand an existing fish farm. It is suitable for different farming models - intensive, semi-intensive or extensive.

A modern closed water supply system (CWS) for fish farming is a fully finished complex that combines advanced technologies for water filtration, bio-treatment and disinfection. The model presented on our website includes three pools of 5 cubic metres each, a CrawTec drum filter, a CrawTec BF-9 biofilter with bio-loading, pumping equipment, a degasser, a UV steriliser and a complete water aeration kit.

The complex is designed for the stable cultivation of various types of fish. It is suitable for professional farms and entrepreneurs seeking maximum productivity with minimum space and water resources.

The main advantages:

• Optimised water treatment system for consistent environmental quality.
• High energy efficiency thanks to powerful pumps with adjustable performance.
• Reliable protection of fish from diseases due to UV sterilisation.
• High-quality aeration to maintain the required oxygen level.

Why choose a CrawTec solution?

Our company specialises in complete aquaculture solutions. We manufacture and offer only time-tested systems that provide high performance. By purchasing an ultrasonic fish tank from us, you get not only high-quality equipment, but also professional support at all stages of start-up and operation.

You can order a closed water supply system for fish right now. Contact our managers for detailed advice and selection of the best solution for your farm.

Thanks to its optimal configuration, this fish water control system allows you to achieve high productivity with limited space and resources.

Annual capacity of the RAS system (with two complete rearing cycles):

• Rainbow trout: up to 2,000 kg per year.
• European char: up to 2,200 kg per year.
• Arctic char: up to 2,400 kg per year.
• Tilapia: up to 3,000 kg per year.
• African catfish: up to 8,640 kg per year.

These figures make it possible not only to ensure a stable turnover of products, but also to quickly recoup the investment in fish farming in the aquaculture facility.

Equipped with a modern drum filter, biofilter, degasser, UV steriliser, as well as powerful pumps and an air blower, the complex provides ideal conditions for fish growth without disruption or loss.

CrawTec is a leading manufacturer of RAS systems for aquaculture in Ukraine. We guarantee high quality equipment, individual support and assistance at all stages of the farm launch.