Recirculating Aquaculture System Concepts

The video tutorial covers the essential needs of fish, emphasizing the importance of water, oxygen, food, and waste removal. It introduces Recirculating Aquaculture Systems (RAS) as a method to maintain fish health and explains how to build a simple RAS using common materials. The tutorial also details the operation of RAS, highlighting the role of mechanical and biological filters in maintaining water quality.

What is the most essential element a fish needs to survive?

• Shelter

• Sunlight

• Water

• Food

Besides water, what are the other three things a fish needs to stay healthy?

• Oxygen, Shelter, Sunlight

• Food, Sunlight, Waste Removal

• Oxygen, Food, Waste Removal

• Sunlight, Food, Shelter

What does RAS stand for?

• Recycling Aquatic System

• Recirculating Aquaculture System

• Renewable Aquatic System

• Revolving Aquaculture System

Which of the following is NOT a skill required for aquaculturists?

• Cooking

• Biology

• Carpentry

• Astronomy

What materials are needed to build a simple RAS?

• A pond, a pump, a filter, a net

• A fish tank, a heater, a net, a light

• A large tank, a heater, a filter, a net

• Two 55-gallon barrels, a 5-gallon bucket, a water pump, PVC pipe

How many pounds of fish can the simple RAS hold?

• 5 to 7 lbs

• 10 to 12 lbs

• 15 to 20 lbs

• 20 to 25 lbs

What is the first step in the RAS water filtration process?

• Water is aerated

• Water is heated

• Water is pumped from the fish barrel

• Water is filtered through sand

What happens to the water after it passes through the mechanical filter pads?

• It is mixed with chemicals

• It is aerated

• It is heated

• Waste solids are removed

What is the purpose of the biological filter media in the RAS?

• To remove dissolved waste

• To change the water color

• To heat the water

• To add nutrients

What is the main requirement for any RAS design?

• It must be colorful

• It must be expensive

• It must be large

• It must meet the fish's needs