Question

The growth of fish gets inhibited if the concentration of dissolved oxygen in water is:

• A. less than 2ppm
• B. less than 6ppm
• C. less than 15 ppm
• D. less than 17ppm

Answer 1

Answer: (B)

less than 6ppm

If the concentration of dissolved oxygen of water is below 6 ppm, the growth of fish gets inhibited.

Scientific studies suggest that 4-5 parts per million (ppm) of dissolved oxygen is the minimum amount that will support a large, diverse fish population.