Modern, intensive, and high-density aquaculture has caused series of problems of water quality and breeding diseases. How to solve these problems? As the saying goes, good water keeps good fishes. So how to have good water? Definitely, it is to use the water purification ability to maintain the microbial ecosystem of natural water. Our aquatic micro- ecological products can decompose residual bait, feces, animal and plant carcasses, etc., reduce the ammonia nitrogen and nitrite content, maintain the balance of bacteria and algae of the water, retain good water activity, thereby to reduce the feed conversion ratio of animal farming, improve survival rate, production performance and product quality, and has the characteristics of health care, growth promotion, and non-toxic side effects.