1) Photosynthesis by acquatic plants, algae, seaweed that occurs below the surface of water produces O2 that remians dissolved in the water body. 2) Large quantities of CO2 gets dissolved in the water. This dissolved CO2 reacts with water molecules to produce O2 as the byproduct. This O2, that is produced as a byproduct, also remains dissolved in water. 3) O2 also dissolves into the water naturally or with waves or where the water body forms waterfalls, rapids, etc. The upwelling/downwelling under the water surface helps dissolve O2. 4) Manmade sources of introducing O2 into a water body includes aeration by means of an airpump. it can be done in a manmade acquatic ecosystems like Aquariums. While, natural water bodies like ponds can also be rejuvenated using aeration. Solution 1) Photosynthesis by acquatic plants, algae, seaweed that occurs below the surface of water produces O2 that remians dissolved in the water body. 2) Large quantities of CO2 gets dissolved in the water. This dissolved CO2 reacts with water molecules to produce O2 as the byproduct. This O2, that is produced as a byproduct, also remains dissolved in water. 3) O2 also dissolves into the water naturally or with waves or where the water body forms waterfalls, rapids, etc. The upwelling/downwelling under the water surface helps dissolve O2. 4) Manmade sources of introducing O2 into a water body includes aeration by means of an airpump. it can be done in a manmade acquatic ecosystems like Aquariums. While, natural water bodies like ponds can also be rejuvenated using aeration..

1. 1) Photosynthesis by acquatic plants, algae, seaweed that occurs below the surface of water
produces O2 that remians dissolved in the water body.
2) Large quantities of CO2 gets dissolved in the water. This dissolved CO2 reacts with water
molecules to produce O2 as the byproduct. This O2, that is produced as a byproduct, also
remains dissolved in water.
3) O2 also dissolves into the water naturally or with waves or where the water body forms
waterfalls, rapids, etc. The upwelling/downwelling under the water surface helps dissolve O2.
4) Manmade sources of introducing O2 into a water body includes aeration by means of an
airpump. it can be done in a manmade acquatic ecosystems like Aquariums. While, natural water
bodies like ponds can also be rejuvenated using aeration.
Solution
1) Photosynthesis by acquatic plants, algae, seaweed that occurs below the surface of water
produces O2 that remians dissolved in the water body.
2) Large quantities of CO2 gets dissolved in the water. This dissolved CO2 reacts with water
molecules to produce O2 as the byproduct. This O2, that is produced as a byproduct, also
remains dissolved in water.
3) O2 also dissolves into the water naturally or with waves or where the water body forms
waterfalls, rapids, etc. The upwelling/downwelling under the water surface helps dissolve O2.
4) Manmade sources of introducing O2 into a water body includes aeration by means of an
airpump. it can be done in a manmade acquatic ecosystems like Aquariums. While, natural water
bodies like ponds can also be rejuvenated using aeration.