How to Start Recirculating Aquaculture Systems Fish Farming


How to Start Recirculating Aquaculture Systems Fish Farming


Recirculating Aquaculture Systems (Ras) fish farming refers to regulatory aquaculture system, It involves fresh water exchange from a fish pond for better growth and sustenance of the fish stock. The fish pond uses a biofiltration or other filtration system to reduce ammonia toxicity in the pond.



Learn More

Types of RAS Fish Farming System.


There are different types of recirculating aquaculture system like outdoor fish tanks, aquariums and Aquaponic system.

READ ALSO: Best Tilapia Fish Farming Business Guide For Beginners

Benefits of RAS Fish Farming.

There are many benefits derived from this type of filtration system. They are highly economical, low water requirements, good commercial viability. Other are high fish stocking or density Stocking, intensive culture. The system provides, healthy environment, reduce dependency on huge amount of clean water.



1. Highly economical

2. Low water requirements

3. Commercial

4. High stocking

5. Reduce water needs

6. Fast growth


How recirculating aquaculture system works.

The RAS Fish Farming water treatment process starts fish pond. It goes from the tank to the solid filtration system then the biofiltration. From the biofiltration it moves to the CO3 degasser. At the CO2 degasser CO2 is removed. From the degasser it moves through pumping to heating and cooling. Next stage is the fine particle removal, PH level control and disinfection . It moves to oxygenation and back to fish tank.

READ ALSO: Marketing Strategies for Your Aquaculture & Shrimp Farm

Treatment process

1. Biofiltration- removal of ammonia, excreted by fish and turned into nitrates.

2. Solid removal- concentrating and flushing the solid waste out of the system.

3. Oxygenation- re- Oxygenate the water to increase dissolved oxygen levels.

4. PH Level. The PH Level is monitored and controlled. Acceptable PH Level for se fish range from 5.0 to 9.0 freshwater.

5. Temperature control. The temperature depends on the type of fish farmed.

Different types require different temperatures.

Tilapia and catfish prefer 24 c, trout and salmon 16c. To regulate temperature some RAS systems use submersible pumps, heaters, chillers.

 join World Farmers Centre Whatsapp group to get and read  articles to help you Succeed in your farming business and relate with other farmers


We do everything possible to supply quality information for farmers day in, day out and we are committed to keep doing this. Your kind donation will help our continuous research efforts.


Please enter your comment!
Please enter your name here