What if there is black water in the pond?

Three identification methods of "black water";

Put a bottle of water under the lamp and let it stand. There are few bubbles, and a lot of sediments are accumulated at the bottom of the bottle, mostly black water caused by too much organic matter. Under the microscope, it can be judged that it is arthropod or cryptoalgae. You can also make a bottle of water in the pond around 4 pm and let it bask in the sun for a few minutes.

1. There are no or few bubbles in the bottle wall, and the large particles of sediment at the bottom of the bottle are macromolecular organic substances, while the small particles are micromolecule organic substances.

There are many bubbles on the bottle wall. There is strong phototaxis of Arthropodium in the upper layer of the bottle wall, but there is no cryptoalgae. In addition, a large number of other algae, such as Chlamydomonas of Chlorophyta, will also form black water, and many ponds often have cryptophyta, knee algae, organic matter and so on.

In addition, the "black water" caused by improper fertilization and excessive use of nutritional fertilizers such as amino acids: this "black water" has many bubbles and less precipitation, which is mostly caused by dominant algae species formed by arthropods and cryptococcus.

Regulation of dark brown water in pond

1. Black water treatment caused by arthropod overgrowth.

The most direct method is to change water; If water cannot be changed, harmful algae should be treated first. Bacterial toxin (50% potassium persulfate double salt, 300g-500m) can be used to kill algae in sunny days, and oxygen can be increased with oxygen tablets or granular oxygen at night to prevent hypoxia at night. Because algae have phototaxis and concentrate in the middle and upper layers of water, only the area can be considered when calculating the dosage.

The next day, the clear water is cool (500ml mu. M) is used for detoxification.

On the third day, new algae-rich algae water was introduced for algae culture. Amino acid fertilizer and water essence+algae species+water beauty can be used to cultivate algae with fertilizer and water EM, and the effect is better.

2. Treatment of dark brown water containing excessive organic matter in aquaculture water:

Immediately reduce or stop feeding feed and add new water. Start the aerator more to aerate and promote the decomposition of organic matter.

It is suggested that molecular oxygen particles should be used to improve the bottom first, and then desliming (Bacillus subtilis) and water purification EM bacteria should be used to adjust the water quality. When necessary, high-quality water rich in algae phase can be introduced at the same time to cultivate beneficial algae, which can effectively eliminate bad water color in 3 ~ 5 days.

It should be noted that when there are serious adverse reactions to cultured fish, the bottom modification can only be used after detoxification and anti-stress treatment with organic acids and ginger, otherwise the dead fish may be induced.