Why does the pond water turn green, and what to do with the fish pond water turning green

In recent years, the eutrophication of Taihu Lake water has become increasingly serious, and the blue-green algae of phytoplankton in the lake have multiplied and flooded every year, causing serious pollution to the lake water, which is a major problem in the comprehensive treatment project of "making Taihu Lake water clear". The relevant departments have proposed to use imported algae fishing boats to clean up the blue-green algae and completely clean up the silt at the bottom of the lake, but due to the 3.2 million mu area of Taihu Lake, the workload is large, and the capital investment is large, it is difficult to achieve results for a while.

The silver carp is a fish that is not very valuable for food or economy, but it has one characteristic: it feeds on phytoplankton in the water, which is precisely the nemesis of blue-green algae in Taihu Lake. Large numbers of silver carp grow in Taihu Lake and can eat large amounts of blue-green algae, and experts estimate that about 5 kilograms of phytoplankton can be converted into 0.5 kilograms of fish meat.

Stocking 10 silver carp in 1 acre of water surface can play an obvious role in improving water quality.

Encyclopedia. Value Cyanobacteria are the earliest photosynthetically oxygenated organisms, which have played a huge role in changing the earth's surface from an oxygen-free atmospheric environment to an aerobic environment. There are many cyanobacteria (e.g. anaanaea) that can directly fix nitrogen in the atmosphere to improve soil fertility and increase crop yields.

There are also blue-green algae that are used as food for people, such as the famous hair cabbage and common candida (ground fungus), spirulina, etc. Hazards In some nutrient-rich water bodies, some cyanobacteria often bloom in large numbers in summer and form a layer of blue-green and fishy-smelling foam on the water surface, called "blooms", and large-scale blue-green algae outbreaks are called "green tides" (corresponding to the red tides that occur in the ocean). Green tides cause water quality to deteriorate, and in severe cases, deplete oxygen in the water and cause fish to die.

What's more, some species of cyanobacteria (such as microcystis) can also produce toxins (MC for short), and about 50% of the green tide contains a large amount of toxins that are not only directly toxic to fish, humans and animals, but also an important cause of liver cancer. MC is heat-resistant and not easily decomposed by boiling water, but can be absorbed by activated carbon, so it can be purified with an activated carbon water purifier. Natural Enemies Algae such as cyanobacteria are food for flowers and silver carp, and algae can be treated by stocking such fry to prevent algae blooms.

It is because the pond is polluted and eutrophicated that the algae grow wildly, and the algae are originally small, but they accumulate together to form a visible green color.

Algae, plankton, whatever.

Rich in planktonic algae!

Water turning green is the reason for the proliferation of green algae, ozone has strong oxidation, can kill green algae, but if ozone is directly passed into the aquarium, it will also kill fish and aquatic plants, so it is usually used ozone to access the protein skimmer, after the water flow through ozone action and volatilization, clean water flows into the tank, so ozone will only kill the planktonic green algae, but there is no way to attach the green algae, and this method is very costly, only aquarium enthusiasts will use it, And they don't use ozone primarily to get rid of green algae, so it's not very practical.

First of all, you don't have to be alarmed by these green algae, the traditional Chinese goldfish farming method strongly advocates the use of green water to raise fish, because green algae can absorb harmful substances in the decomposition water through photosynthesis and release oxygen, and it is also a good auxiliary food for goldfish.

But if the landlord is raising fish in an aquarium, then the green algae is very aesthetically detrimental, and the most popular and feasible way to prevent the bloom of green algae is .........Changing the water, well, is changing the water, even the master of the aquarium is doing this now (because the accumulation of nitrate in the bare tank is a worldwide problem), reduce the "nutrition" of the water, and the green algae will naturally not be able to reproduce. There are also some auxiliary methods: planting aquatic plants, lowering the light, feeding less (as if abusing animals), raising some algaecide creatures such as scavengers, scrubbing the walls of the tank (this is also counted!).

etc., are very simple and easy to use, and the effect is good. Well, that's all I have to say, I hope it will be helpful to the landlord.

The treatment method of turning the water of the fish pond green: add an appropriate amount of salt to the water, reduce the number of chlorella, and use a UV ultraviolet germicidal lamp.

1. Add an appropriate amount of salt to the water

Chlorella is a narrowly saline organism that is sensitive to the salinity of the water body, so adding an appropriate amount of salt to the water can destroy the suitable living environment of chlorella, thereby removing green algae.

2. Reduce the number of chlorella

Chlorella needs sunlight, water and carbon dioxide to carry out photosynthesis, so building shade facilities on ponds to reduce light exposure can reduce the number of chlorella.

3. Use UV ultraviolet germicidal lamp

UV ultraviolet germicidal lamp can effectively kill various microorganisms in the water body, especially the green algae is very effective. Generally, about 3 days after use, the green water gradually disappears, and the slowest is not more than 10 days.

The treatment of pond water turning green is as follows:1. Clean the pond: remove the fish feces and green algae sap in the pond to restore the original color of the pond water.

2. Planting aquatic weeds is defeated: aquatic weeds can absorb inorganic salts and reduce the growth rate of green algae.

3. Put silver carp: silver carp feed on green algae, which can reduce the number of green algae.

4. Apply phosphate fertilizer: Phosphate fertilizer can inhibit the growth of green algae.

The use of algaecide to remove algae is relatively good compared to the unilateral effect of algae removal, but the use of algaecide has a certain harmful effect on the fish and grass plants in the pond, it is not recommended to use, and it has a strong ability to sterilize and kill algae in general water quality, which can effectively reduce algae reproduction, make algae irreversibly inhibit growth, high efficiency, and do not produce residues, and the cost is relatively low.

Fish pond water turning green can be used for biological control, salinity control, use of algaecides, reduced feeding, and stable water quality.

1. Biological control.

1) Put an appropriate amount of Daphnia into the pond, and Daphnia will use chlorella as food, which can have an inhibitory effect after a period of time.

2) It should be noted that there should be no fish feeding on Daphnia in the pond at the time of stocking.

2. Salinity control.

Chlorella is a narrow-salt organism that is sensitive to changes in salt concentration, and adding salt to water can also have a certain algae removal effect.

3. Use algaecides.

1) Use algaecides such as copper sulfate, dilute and then sprinkle the whole pool, and then replace the water quality of 1 2 the next day.

2) Some algaecides are toxic and will cause harm to fish and aquatic weeds, so caution should be exercised when using them.

4. Reduce feeding.

1) Control the amount of feed to avoid eutrophication of water bodies.

2) Build an awning on the fish pond to reduce direct sunlight, which can inhibit the growth of chlorella.

5. Stabilize water quality.

Disinfect regularly, inject fresh water regularly, and replace part of the bottom sewage, keeping the temperature of the new water in line with the temperature of the pond water.

The dangers of turning fish pond water green:

1. It is easy to pour algae.

The hazards of inverted algae have made the poor farmers know that oxygen consumption, rotten bottom and deteriorating water quality are all headaches for farmers. There is a large amount of algae in the green and thick pond, and once it encounters sudden rainy weather, it will cause a large number of algae to die, and the algae will fall, causing economic losses.

2. It is easy to lack oxygen.

The green color of the pond means that there is too much algae in the pond, and although the photosynthesis is strong during the day, at night, the algae do not see sunlight and cannot photosynthesize. It can only perform respiration, competing with crayfish for oxygen. River crabs are prone to hypoxia at night, which leads to floating grass.