RAS Indoor Fish Farming Equipment

Fish Tanks

• Material: Fiberglass-reinforced plastic (FRP), high-density polyethylene (HDPE), or concrete.
• Capacity: Ranges from 500 liters to 10,000 liters or more, depending on fish species and production scale.
• Shape: Circular tanks for better water flow and waste removal or rectangular tanks with proper flow design.
• Features: Smooth inner surfaces to prevent injuries, overflow outlets, and drain systems.

2. Mechanical Filtration System

• Purpose: Removes suspended solids (uneaten feed, fish waste).
• Components:
  • Drum Filter: Fine mesh (20–100 microns) for efficient solid waste removal.
  • Settling Tank/Clarifier: For larger solids.

3. Biological Filtration System

• Purpose: Breaks down ammonia into less harmful nitrates (nitrification process).
• Components:
  • Media: Bio-balls, K1 media, or similar high-surface-area materials.
  • Type: Moving Bed Bio-Reactors (MBBR) or Fixed Bed Systems.
  • Flow Rate: Match to system size, ensuring adequate contact time for nitrifying bacteria.

4. Pumping System

• Types: Centrifugal or submersible pumps.
• Capacity: Rated for the total water volume, ensuring adequate flow to all parts of the system.
• Energy Efficiency: High-efficiency pumps reduce operational costs.

5. Aeration and Oxygenation

• Aerators: Paddlewheels, diffused aeration systems, or air blowers.
• Oxygen Generators: For high-density systems.
• Dissolved Oxygen Levels: Maintain 4–8 mg/L for optimal fish health.

6. UV Sterilizer or Ozone Generator

• UV Sterilizer:
  • Capacity: Match flow rate; typically, 30–150 watts for small to medium systems.
  • Purpose: Eliminates harmful pathogens and algae.
• Ozone Generator: Optional for advanced sterilization.