What is one of the benefits of using aquaponics to grow crops?

Possible Answers:
Uneaten fish food and fish waste turn into fertilizer for soil.
The fish purify the water to be used by the plants.
The plants decompose and add nutrients into the water to provide proper O2 levels.
The crops provide fish with a natural food source

1 answer

The fish purify the water to be used by the plants.