[ Dissolved oxygen ]

Dissolved oxygen refers to the amount of oxygen dissolved in water. The ecosystem of waters with higher oxygen desorption is usually more diverse and stable. The decomposition of organic matter is the main reason for the decrease of species caused by low dissolved oxygen. Generally, the dissolved oxygen in water suitable for fish growth requires more than 3.0 mg/L, which is an important indicator of water pollution.

Step1. Fill a glass bottle with water to be sampled.
Step2. Take out two DO pills, crush them into powder and add them to the bottle.
Step3. Cover and shake to completely dissolve.
Step4. Wait for 5 minutes. Compare the color.
Step5. Do not pour the water back into the river, it is recommended to pour it on the road and evaporate naturally.

[PH test]

Most aquatic organisms have a narrow pH tolerance range of 6.5 – 8.5. Acidic waters can cause toxic heavy metals to be released into the water, making it corrosive, causing damage to river, sea and port system equipment, killing fish and shellfish, and making the water unsuitable for recreation, irrigation and water supply.

Step1. Fill a glass bottle with water to be sampled.
Step2. Add the pH pills directly.
Step3. Cover and shake to completely dissolve.
Step4. Compare the color with the chart.
Step5. Do not pour the water back into the river, it is recommended to pour it on the road and evaporate naturally.

[Turbidity test]

Turbidity indicates the reflection and absorption properties of water to light. The sources are clay, silica, silt, inorganic and organic particles, plankton, bacteria, etc. Impact: photosynthesis of aquatic plants, fish growth and reproduction, interfere with disinfection.

Step1. Peel off the black and white sticker and stick it on the bottom of the container.
Step2. Fill up with water to the black line.
Step3. Compare the clarity