1, improve the pool of dissolved oxygen: early start aerator and extend the boot time, promote water convection, increase the bottom of the pool dissolved oxygen, accelerate the decomposition of toxic substances; can be used in conjunction with oxygen. 2. Change water in time: Try to add dissolved oxygen-rich surface water, increase the number of water changes and change the amount of water, but avoid large-scale irrigation. Dissolve oxygen and VC immediately after changing water. 3, enhance the body's immune function: mix in the feed EM bacteria + VC + immune polysaccharides, increase feed nutrition, improve shrimp disease resistance. 4. Regulate the water quality: rationally use Xinchang Qingfeng Biological's microbial agent “Ancizyme†to adjust water, maintain the balance of bacteria and algae in the water, and maintain good water quality; effectively degrade ammonia nitrogen, nitrite, and hydrogen sulfide in the pool water. Poisonous and harmful substances, etc.; alternating use of biological fertilizers, amino acids to maintain reasonable pond fat. 5, to strengthen water detoxification: the use of detoxification Bi Shui An relieve water toxins. 6, regularly improve the substrate: the use of oxygen net negative film. Normal use: 100-150 grams per mu; when the substrate is black, stinks, bottom heat, detoxification, deodorization, 200-250 grams per mu; when dealing with black water, old green water, red tide water and other bad water 200 grams per mu, use it again the next day. D-Sodium Erythorbate,D-Sodium Erythorbate Food Grade,D-Sodium Erythorbate Powder,Food Additives D-Sodium Erythorbate SHANDONG BAISHENG BIOTECHNOLOGY CO., LTD , https://www.baishengbioproducts.com