The phrase "% of O2 in 1L water @ 25C" refers to the percentage of oxygen present in one liter of water at a temperature of 25 degrees Celsius.
The "% of O2 in 1L water @ 25C" is typically measured using a dissolved oxygen meter, which measures the amount of oxygen dissolved in water by using a probe that detects changes in electrical currents.
The normal range for "% of O2 in 1L water @ 25C" in natural bodies of water can vary, but typically ranges from 4 to 15%. However, this can vary depending on factors such as water temperature, depth, and surrounding vegetation.
The "% of O2 in 1L water @ 25C" is crucial for the survival of aquatic life. Fish and other organisms rely on oxygen dissolved in water to breathe, and a decrease in oxygen levels can lead to hypoxia and even death for these organisms.
The "% of O2 in 1L water @ 25C" can be affected by various factors such as temperature, water flow, amount of sunlight, and presence of algae or other aquatic plants. Human activities such as pollution and nutrient runoff can also significantly impact the oxygen levels in a body of water.