Dissolved Oxygen
The term "dissolved oxygen" means the amount of oxygen dissolve in a body of water as an indication of the degree of health of the water and its ability to support a balanced ecosystem. The oxygen comes from plants in the water and also contact with the atmosphere as well.
Steps to do a dissolved oxygen test:
1.) Put water filled to 25 mL into a container.
2.) Get tube with a sort of yellow water and place it in the sample.
3.) Then break off the tip of it.
4.) Let it sit in the water for a few seconds.
5.) After you removed it place your finger on the removed tip and turn it upside down over and over.
6.) After mixing it up let it sit for about 2 minutes.
7.) Compare results with the chart.
Our results showed about 9 mL which is good because if the oxygen was less than 3 mg/l it would not support the fish. In a small pond it would probably hold more oxygen than in an aquarium because there would be more plants. A large river would have probably the most dissolved oxygen because a fast current allows more oxygen than a lotic system such as a pond. A pond would also probably be warmer which warm water holds less oxygen.
Steps to do a dissolved oxygen test:
1.) Put water filled to 25 mL into a container.
2.) Get tube with a sort of yellow water and place it in the sample.
3.) Then break off the tip of it.
4.) Let it sit in the water for a few seconds.
5.) After you removed it place your finger on the removed tip and turn it upside down over and over.
6.) After mixing it up let it sit for about 2 minutes.
7.) Compare results with the chart.
Our results showed about 9 mL which is good because if the oxygen was less than 3 mg/l it would not support the fish. In a small pond it would probably hold more oxygen than in an aquarium because there would be more plants. A large river would have probably the most dissolved oxygen because a fast current allows more oxygen than a lotic system such as a pond. A pond would also probably be warmer which warm water holds less oxygen.
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