(1) continuous high temperature or warming, this kind of weather will strengthen the photosynthesis of algae, algae reproduction is too prosperous, the pH value of the pond with thick water color is higher.

(2) the strong photosynthesis of cyanobacteria, Euglena, dinoflagellates, and so on (dinoflagellates in sunny days when photosynthesis is strong) excessive reproduction, resulting in high pH.

(3) single algae phase leads to excessive fertilizer in water body: single algae phase is not inhibited by other algae due to its growth, which is easy to lead to excessive fertilizer, and photosynthesis will be very strong, thus making the pH continuously high. Such as diatoms, green algae in the early breeding are easy to cause a single algae phase water quality.

(4) Sandy soil and calcareous substance: the pH value of the pool water is relatively high because of the high content of alkaline substances, especially in the winter when the pond is sunburned for a long time.

(5) alkaline drugs such as lime clear the pond: alkaline drugs will make the pH of the pool water continue to be high.

High pH value will corrode the gill tissues of prawns, resulting in poor respiration, loss of appetite and difficulty in shelling of prawns. In severe cases, a large number of shrimp deaths will mainly occur in the early stage of breeding, especially when seedlings are released. If the pH value is too high, the shrimp seedlings placed in the pond will be very difficult to shelled or cannot be shelled, thus affecting the normal growth rate of shrimp seedlings. At the same time, high pH value will increase the toxicity of ammonia nitrogen and nitrite in water, which can cause a large number of shrimp death.

(1) good water conditions can change part of the water, with a large dose"Lactobacillus stock solution"Use after soaking, sprinkle before use"Clear water detoxification"The effect is better.

(2) Algal phase single use"EM Golden Dew"Balanced algal phase, used together"Diatom Vang"with"Super algae species", cultivate beneficial algae-based diversified algae phase, to avoid the occurrence of a single algae overfertilizer.

(1) In the middle and late stages of breeding, the amount of baiting increases, prawns produce a large amount of excreta, and a large number of dead and sinking algae in the water body make the water too much organic matter, low transparency and aging water quality.

(2) The silt in the shrimp pond is too much, and the pond is not completely cleared and disinfected.

(3) Zooplankton multiply or die in large numbers.

(4) exogenous water ammonia nitrogen is too high, too much injection.

(5) the bottom of the pool dissolved oxygen is low, nitrogen-containing organic matter, nitrate, nitrite in the role of anaerobic bacteria, the occurrence of denitrification to produce ammonia nitrogen.

(6) lack of carbon source in water, nitrogen in water is not easy to transform.

(7) excessive use of nitrogen-containing fertilizers.

(1) The hazards of chronic ammonia nitrogen poisoning are reduced food intake, slow growth, shelling and tissue damage.

(2) The harm of acute ammonia nitrogen poisoning is manifested as shrimp excitement, wild swimming, cramps, climbing edges, severe cases and even death.

(1) Use when ammonia nitrogen is too high"Super strong bottom net"Cooperation"Detoxification and Water Protection Treasure"Rapid degradation of ammonia nitrogen.

(2) Regular use of zooplankton-prone ponds"Beautiful bottom"Inhibit insect eggs and prevent zooplankton outbreaks.

(3) Regular use"Quick rescue spirit" "long-lasting large oxygen"To maintain higher dissolved oxygen in the water body to prevent the increase of ammonia nitrogen concentration caused by the decrease of dissolved oxygen.

(4) Regular use of probiotics, such"Lactobacillus stock solution","EM Golden Dew"and so on, to promote the transformation of organic matter in the water body.

(5) when the fertilizer"Diatom Vang"or"Super algae species"Cooperation"Bacterial Algal Carbon Source"Supplemental water carbon source, consumption of excess nitrogen in water.

(1) The bottom of the pool is aging, the work of clearing the pond and drying the pond is not complete, and the silt contains a large amount of organic matter.

(2) The breeding density is too large, and the residual bait feces are too much, which is decomposed under anoxic conditions.

(3) the amount of algae in water is too little, and the conversion of ammonia nitrogen and nitrite is not smooth.

(4) the lack of beneficial bacteria in the new pond.

(5) too much zooplankton, producing ammonia nitrogen.

(6) A large number of dead algae decomposed after inverted algae led to a sudden increase in sub-salt.

(7) feed too much, feed protein is too high or shrimp digestibility caused by the waste of nitrogen in the bait, also can lead to high salt.

(8) the whole breeding period of chronic accumulation.

(9) exogenous water ammonia nitrogen, nitrite is too high.

(10) excessive application of nitrogen fertilizer.

(1) After nitrite enters the blood through gill filaments through shrimp respiration, it will cause hemocyanin, which transports oxygen in the blood, and its oxygen-carrying capacity will decrease, causing tissue hypoxia, reduced food intake, slow response, decreased body disease resistance, and shrimp are prone to symptoms of hypoxia. In this case, even if dissolved oxygen is abundant in the water body, shrimp is difficult to effectively ingest, and symptoms such as red body, red tail and red whisker will appear. Often die at the bottom of the pool, and there are no obvious symptoms after death, which is collectively referred to as "stealing death syndrome", "dead bottom syndrome", "risk bottom" and "bottom consumption".

(2) High nitrite during shelling often causes death of shrimp shells, or death of soft shells after shelling.

(1) Use"Super strong bottom net"Cooperation"100 Poison Quick Solution"(can be matched with"Save the spirit quickly"increase effect), degradation of nitrite.

(2) Use"Nitrosyn"Biodegradation, safe and efficient.

(1) Thoroughly clear the pond and use it regularly"Beautiful Bottom", "Super Strong Bottom Net" and "Wei Deli"Change the bottom.

(2) Use"Diatom Wang" "Super algae species" "Quick-acting fertilizer essence"Cultivate algae to fertilize water and absorb and transform sub-salt.

(3) multi-open aerator, regular use"Long-acting large tracts of oxygen"Maintain a high level of dissolved oxygen throughout the water.

(4) regular bacteria, such"Bacteria Supplement Expert", "EM Golden Dew" and "Beautiful Water".

(5) Reasonably release seedlings and feed properly.

(6) Regularly add new water, check the physical and chemical indicators before entering the water, and use"Clear water detoxification"and"Stress Jiedu Ling"Steady water steady shrimp.

(7) Reduce the amount of bait and reduce the further pollution of the water body.

(1) The oxygen production capacity is weak and the oxygen consumption is strong.

(2) poor nutrition of algae, shrimp do not like to eat.

(3) easy to reverse algae.

(4) Low transparency.

(1) Regular use"Nut enzyme fertilizer"Cooperation"Probiotic Bulb"Fertilizer supplement bacteria to prevent algae aging.

(2) Do microscopic examination frequently and timely supplement when algae are found to be aging."Diatom Vang"Cooperation"Super algae species"rapid culture

New algae.

(3) collocation of fertilizer and water"EM Golden Dew"Cultivate diversified algae phase to prevent algae aging.

(4) Regular use"Long-acting large tracts of oxygen"Improve water dissolved oxygen.

This article: Liu Changming

Editor Review: Zang Xueyun