Aquaponics: The Symbiotic Relationship Between Fish and Plants

Where does the fertilizer for plants come from in aquaponics?

a) tap water
b) dead and decomposing plants
c) chemical added to the tanks
d) fish waste

Answer:

d) fish waste

In aquaponics, the fertilizer for plants primarily comes from fish waste. When fish excrete waste, it contains nutrients like nitrogen and phosphorous, which are essential for plant growth. These nutrients are then broken down by bacteria present in the aquaponics system, making them available to the plants through their roots.

The fish excrete ammonia through their waste, which is then broken down by beneficial bacteria into nitrites and then nitrates—a form of nitrogen that serves as an excellent fertilizer for plants. These nitrates are absorbed by the plants through their root systems, providing essential nutrients for growth.

This natural cycle creates a symbiotic relationship between the fish and plants, as the plants filter the water for the fish by consuming these nutrients, helping to maintain a healthy aquatic environment. This method eliminates the need for additional chemical additives and relies on the organic waste produced within the aquaponic system.