RAS Fundamentals
What Is a Recirculating Aquaculture System (RAS)?
Learn what a recirculating aquaculture system (RAS) is, how water is reused, how fish waste is managed, and what makes a complete RAS in aquaculture.
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RAS Knowledge & Project Insights
Practical guidance on RAS planning, water treatment, equipment selection and system operation for commercial aquaculture projects.
Featured Guides
System Design & Planning
How to Select RAS Equipment for a Commercial Fish Farm
Learn how to select and match RAS equipment based on biomass, feed load, recirculation flow, treatment requirements, and peak operating conditions for a commercial fish farm.
Water Treatment & Equipment
Oxygenation in RAS: Why Dissolved Oxygen Is Critical for High-Density Aquaculture
Learn why dissolved oxygen is critical in high-density RAS, what consumes oxygen, why DO fluctuates, and why aeration alone may not meet peak oxygen demand.
Browse All Articles
Water Treatment & Equipment
Protein Skimmer vs. Drum Filter: What Does Each Remove in RAS?
A drum filter and a protein skimmer both help treat wat […]
Water Treatment & Equipment
Why Does CO₂ Removal Matter in a Recirculating Aquaculture System (RAS)?
A recirculating aquaculture system (RAS) needs to manag […]
Water Treatment & Equipment
How to Choose the Right Drum Filter for Aquaculture
Choosing a drum filter for aquaculture starts with two […]
Water Treatment & Equipment
How to Choose the Right Aquaculture Tank for a Commercial RAS Project
Choose aquaculture tanks around your production plan, working water level, site access and RAS connections. Use the comparison and checklist to prepare a consistent tank inquiry.
System Design & Planning
Commercial RAS Design: What Information Should Be Confirmed Before System Design?
Plan a commercial RAS project with clear production goals, site records, water reports and utility information before system design and equipment selection.
Water Treatment & Equipment
What Is an Aquaculture Tank? Complete Guide
Learn what an aquaculture tank is, how fish farming tanks are used, common tank types, and how culture tanks work within recirculating aquaculture systems.
Water Treatment & Equipment
Oxygenation in RAS: Why Dissolved Oxygen Is Critical for High-Density Aquaculture
Learn why dissolved oxygen is critical in high-density RAS, what consumes oxygen, why DO fluctuates, and why aeration alone may not meet peak oxygen demand.
Water Treatment & Equipment
Moving Bed Biofilm Reactor Technology Explained
Learn how Moving Bed Biofilm Reactor (MBBR) technology works, including biofilm carriers, aeration, mixing, nitrification, and its role in aquaculture RAS.
Water Treatment & Equipment
How Does an Aquaculture Degassing Tower Work?
Learn how an aquaculture degassing tower uses water distribution, packing media, gas-liquid mass transfer and continuous gas extraction to remove dissolved CO₂ from RAS water.
Water Treatment & Equipment
Foam Fractionation in Aquaculture: How Protein Skimming Removes Dissolved Organics
Learn how foam fractionation removes dissolved and fine organic matter from aquaculture water using fine bubbles, surface adsorption and foam separation.
Water Treatment & Equipment
What Is UV Sterilization in Aquaculture and How Does It Work?
Learn what UV sterilization is in aquaculture, how UV-C light at approximately 254 nm inactivates microorganisms, and how UV treatment works in a RAS.
Water Treatment & Equipment
What Is an Aquaculture Drum Filter?
What is an aquaculture drum filter? Learn how rotary drum filters remove suspended solids from RAS water, what they remove, and their role in aquaculture filtration.
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