How much D.O do fish need?

D.O and ph || About ph ||How Much D.O Do Fish Need||Glossary || Results || Bibliography

Fish need D.O so they can breathe. fish are cold blooded so they use more oxygen. When D.O levels drop fish die. When water goes down to 3.0 parts per million fish die. Fish need about 5 to 6 parts per million of D.O . Dissolved oxygen is one of the most important indicators of health and D.O is related to organic plants.