What is Dissolved Oxygen

Back to main page // why do fish need D.O // what is D.O. // what is pH // how does ph affect water // results // how much D.O do fish need // why is pH important

D.O stands for dissolved oxygen. D.O is oxygen dissolved in water. Oxygen enters the water by direct absorption. Dissolved oxygen is one of the best indicators of the health of a water ecosystem. Dissolved oxygen levels change and vary according to the time of day, the weather, and the v

Diecreases in the dissolved oxyegen levels can cause changes in the types and numbers of aqatic microinvertibates which live in a water ecoysystem..Oxygen levels also can be throuh over firtilization of water plants by run -off from farm fieads contaning phosphatees and nitrates