“If you want to raise fish, you must first raise good water.†By observing the color of water, you can know whether the water quality is good or bad, so that you can take effective measures (such as draining old water, injecting new water, fertilizing, etc.) to improve water quality. Fish is healthy and grows quickly.
The water is yellowish green and refreshing. It is good water. The color indicates that the shade of water is moderate, and the algae in the water body are mainly diatoms, followed by green algae and bare algae.
The water is green grass and refreshing, it is a good water. The color indicates that the water color is thick, and the algae in the water body are mainly composed of green algae and bare algae.
The water color is green and good. The color indicates that water quality is moderate and thin, and this kind of water color is more common in the water applied organic fertilizer. The algae in the water body are mainly diatoms, green algae, dinoflagellates and cyanobacteria, and the quantity is relatively balanced.
The color of the water is dark brown and it is a good water. The color indicates that water quality is moderate and thin, and this kind of water color is more common in the water applied organic fertilizer. The humic substance concentration in this water-colored water body is larger, and the algae in the water body are mainly diatoms and cryptophytes, followed by euglena, green algae and dinoflagellates.
The water color is blue-green, gray-green and muddy, and the hot weather often appears on the water table on the side of the pond's side with a grayish-yellow floating membrane, which is bad water. The color indicates the aging of the water quality of the water body. The algae in the water body are dominated by blue-green algae, and the quantity is dominant.
The color of the water is yellowish, orange and turbid. There is a floating film of the same color on the water meter. It is bad water. The color indicates that the color of the water body is too thick, and the water quality is deteriorated. The algae in the water body are mainly cyanobacteria, and a large number of deaths have begun.
The water is gray and bad. The color indicates that a large amount of plankton in the water body has just died, the water quality has deteriorated, and the water body is seriously deprived of oxygen, and there is often the danger of flooding ponds.
The water color is dark brown and it is bad water. This color indicates that the water color is older and nearer to deteriorate. It may be caused by the application of too much organic fertilizer, and the content of humus in the water is too much. The algal species in the water body is dominated by cryptophytes, followed by blue-green algae and bare algae.
The water color is light red, and the color is often unevenly distributed and is bad water. This color indicates that the otters in the water have excessive breeding and very few algae. This water-colored water body has a low dissolved oxygen content and has turned into a water phenomenon with relatively thin water.
For brown water, the brown water formed at the early stage of fertilization is good water, and the water that turns from other water color to brown in the middle and later stages is bad water.
"Fish raising water first," which is the experience of fish farming, is the result of long-term production practice for fishermen in our country. A basic function of water conservation is to look at the color of water. Water is dissolved in water, suspended particles and The existence of plankton is formed, and the type and quantity of plankton are the main reasons for reflecting the color of the water. Because of the many phytoplankton in plankton, the body contains different pigment cells, and when the species and quantity thereof change, the pool water appears different. The color and concentration, as time goes by and the weather changes, as well as the aquatic phytoplankton survived and alternated generations, the population and quantity of aquatic phytoplankton also changed, and the water color also changed.
There are two types of favorable color for fish farming. One is green, including yellow green, brown green, oil green. The other is brown, including yellow brown, red brown, green brown. This is because the amount of plankton in these two types of water bodies is large, and fish are easily absorbed and digested. Such water can be called "fat water." If the water color is light green, dark green or grey-blue, it can only reflect the quantity of phytoplankton, but it cannot explain its good quality. This kind of water is generally regarded as thin water and is not good for fish. If the color of the water is black, brown or green, even with a stench of stench, this is a sign of deterioration. Old water or evil water will cause dead fish in the pond.
Generally, "water and fertilizer" refers to thick water, and phytoplankton has a high biomass and bloom, but it is not necessarily a good water. Conversely, the water color is not necessarily "slim", and if the phytoplankton fish that forms this water can be used, it should be good water.
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