Dissolved oxygen

Oxygen (O2) is a substance that is important for the life of organisms.

Oxygen is needed by aquatic organisms to breathe.

fish in water need oxygen to breathe.



oxygen can dissolve into water through a diffusion process.

the factors that can affect the amount of oxygen that dissolves in water are as follows:

1. temperature. temperature affects the saturation of water (the capacity of water to absorb oxygen). When the water temperature is high, less oxygen will dissolve.

2. Surface water movement. movement of surface water in the form of waves will accelerate the process of diffusion of air into the water.

3. Air pressure. This air pressure is related to the height of a place above sea level. if an area is higher then the air pressure will be low so that dissolved oxygen will be low.

4. salinity. the higher the salinity value, the less dissolved oxygen will be.

5. aquatic plants. aquatic plants associated with photosynthesis. the photosynthesis process will produce oxygen. the process of photosynthesis requires sunlight. if a little sunlight will inhibit the process of photosynthesis so that there will be little oxygen.

fish get oxygen from water, if the dissolved oxygen level is low then the fish life becomes disturbed.

the amount of oxygen needed for each type of fish that lives in water will not always be the same, usually the agile fish species will need more oxygen than calm fish species.

water for fish maintenance must have a minimum oxygen content of 5 mg / liter.

how to measure oxygen levels in water can use a DO-meter or oxygen kit.

for fish that have a labyrinth such as catfish can live in a water environment that has a small amount of dissolved oxygen.

Catfish can live in waters with little oxygen because they can take oxygen directly from the air.

the small dissolved oxygen content can be increased by giving aeration to the pond or aquarium.

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