1, dangerous water color: green turbidity
Blue-green or old-green: The water quality is thick and turbid, and there is a small amount of green suspended fine powder on the surface of the water at the downwind. This is most likely to occur in aging pools and easily becomes "patina water". In this water body, shrimp can still survive, but the incidence of shrimp is increased
Blue-green
Causes: Blue-green algae or microcysticerces in the water multiply in large quantities, the water quality is turbid, the transparency is low, and there is a small amount of green suspended fine powder in the downwind outlet, which is the most likely to occur in the summer high temperature, high nitrogen and low salinity water body or aging pond, and it is easy to become patina water. In this water body, shrimp can still survive, but the pond environmental stress forces, the need for water quality regulation, otherwise the water quality will soon age, a large number of algae death floating on the water surface, causing a chain effect, shrimp are prone to disease.
Old green
Causes: Harmful algae concentration is large, and begins to die, the water surface appears oil slick dirt, and a large number of dead algae may appear in the downwind outlet.
These two kinds of water color is thick, turbid, water sticky and slippery, and the water splash raised by the aerator is light green or light blue, with foam, and the foam tail is long and difficult to disappear.
These two water color treatments
1) Proper water replacement, conditional can be discharged from the upper surface water, if the downwind outlet, suspension of fine powder, can be pumped away or sunny afternoon in the downwind sprinkled with algae-killing drugs, etc., and appropriate water replacement, with the use of anti-stress (full-effect anti-excitation) and detoxification (detoxification Bishui'an) products will be better;
2) Apply a large amount of water doctor and sodium humic acid, use for two consecutive days, and add an aerator, introduce a water source containing excellent algae seeds, and divert water.
2. Gray-green, gray-blue or dark green:
Causes and measures
Causes: High concentrations of harmful algae, beginning to die, and the water surface appears to be oil-slick.
The above two kinds of water quality is thick, turbid, dead, water sticky and slippery; the water splash started by the aerator is light green or light blue; it is easy to have foam, and the foam tail is long and difficult to disappear.
Measures: 1, when changing water, conditional can be discharged upper surface water, if the downwind outlet, suspension of fine powder, can be pumped away or sunny afternoon in the downwind sprinkled with algae-killing drugs, etc., and appropriate water replacement, with the use of anti-stress and detoxification products will be better.
2. Apply a large amount of rehydrogen and sodium humic acid for two consecutive days, and add an aerator, and after the introduction of water sources containing excellent algae species, the water will be diverted.
3, dangerous water color: reddish brown, black brown, white turbidity
Sorrel
There are a large number of protozoa or red tide organisms in the water.
Dark brown or soy sauce color
It is because of too much feed feeding and too much residual bait feces, resulting in an increase in solubility and suspended organic matter. The water is extremely eutrophicating, and the water quality and substrate are extremely aging. Because some bad algae secrete toxins, the shrimp are poisoned, and the substrate deteriorates, and the incidence of shrimp is very high.
The above two kinds of water quality is thick, turbid, dead, water sticky and slippery; the water splash started by the aerator is light red or light black; it is easy to have foam, the foam tail is long, it is difficult to disappear, and the water and the bottom have a fishy odor.
Causes and measures of this type of reddish-brown color
There are a large number of protozoa or red tide organisms in the water.
This kind of water color PH is high, viscosity is large, and there are a large number of oil layers and dead algae on the water surface when severe. It is a very serious water pollution.
Treatment measures: drain the bottom water on the first day, disinfect the whole pond, and apply calcium peroxide in the evening after detoxification in the afternoon; The next morning is filled with new water for excellent algae seeds, and in the afternoon, water is adjusted using EM bacteria or Bacillus and algal nutrients.
Causes and measures of black brown water
Causes: A large number of algae have died, the self-purification ability of water bodies is low, and residual bait and feces are suspended in water. Performance: the water quality is turbid, there are many impurities in the water, the PH value is low, and the nitrite content is high.
Treatment measures: drain new water on the first day, detoxify, apply calcium peroxide in the evening; The next morning, bacillus is used, the whole pond is sprinkled, continuously used for 2 to 3 days, and the water source of excellent algae species is introduced.
Causes and measures of white turbid water
Harmful microorganisms or zooplankton in the water are over-bred, algae are eaten by zooplankton, resulting in hypoxia in the water, caused by overactivity of zooplankton, or water contains ciliates, rotifers, copepods and clay particles or organic debris.
Causes: A large number of zooplankton (rotifers, branches, copepods) multiply, and a large number of planktonic microalgae in the water are ingested. This kind of water body will promote the rapid growth of shrimp fry in a short period of time, but the water body has low self-purification capacity, large oxygen consumption, ammonia nitrogen and nitrite rise, harmful bacteria multiply, and water quality deteriorates.
Treatment measures: If the shrimp fry is more than 2 cm and can feed zooplankton, the feed can be stopped for 2 to 3 days, and then 5 to 8 cm of fresh water containing excellent algae can be added, and the water can be adjusted with microecological preparations such as bacillus and algal nutrients; If the shrimp fry is under 2 cm and cannot feed on zooplankton, you can first use a safe and effective disinfectant to kill zooplankton, and then add 5 to 8 cm of fresh water containing excellent algae after 2 days, and use micro-ecological preparations such as EM bacteria and algal nutrients to adjust the water.