1. The construction of greenhouses. To build a greenhouse in a place where seawater wells can be drilled, it is necessary to ask a professional agency or department to conduct geological exploration and water quality testing. After the fish culture experiment is ensured to be correct, the address of the greenhouse can be determined. The well depth is 13-20 meters, and the water temperature can be maintained at about 13-18[deg.]C; the well depth is 80-120 meters, and the water temperature can be maintained at 11-15[deg.]C. Seawater wells are best hit in the intertidal zone near the high tide line. The culture greenhouse shed wall is made of red brick cement, and the steel simple arched beam roof truss. The tank floor of the fish tank was placed with reinforced concrete and the slope was reduced by 5%. Pool wall red brick cement mortar masonry, pool wall waterproof 5 layer practice. The bottom of the pool is pre-embedded with drainage pipes. The drain outlet is at the bottom of the pool. The overflow pipe of the drain pipe is inserted into the elbow of the drainage well outside the pool and can be inserted and withdrawn at any time. There are two inlet pipes for each pool, two rows of greenhouses for each greenhouse, one inlet main pipe and drainage ditch. The outside of the main pipe leads the well water and passes through each fish pond.
2. Water treatment process. The water discharged from the fish ponds flows through the underground pipelines to the solid waste separator to remove part of the suspended solids and solid impurities. Then the suspended matter and colloidal particles are further removed by the protein separator, the dissolved oxygen is increased, and the ammonia nitrogen is reduced; The filter tank removes ammonia nitrogen, and groundwater is added to the water temperature adjustment tank as required to adjust the water temperature; the temperature-adjusted water is sterilized and disinfected by a module-type ultraviolet ray disinfection canal; the disinfected water is discharged into the high-efficiency dissolving oxygen device through the pipeline. The dissolved oxygen in the effluent can be saturated or oversaturated; the water quality automatic monitoring system connected to the outlet pipe can monitor the water quality in real time; the treated standard water can be transported along the closed pipe to the aquarium.
3. Breeding process. 1 seed stocking and screening. The stocking density of seedlings is closely related to feeding conditions, water quality, water exchange, and management levels. 6~10cm seedlings can be bred into the pond at a density of 80~150 tails per square inch. With the growth of fish fry, the stocking density is gradually reduced. When the seedlings grow to 400~500g, the stocking density is 20~30 tails/inch.
2 feed feeding. After 6cm seedlings enter the pond, they are fed 3 to 4 times a day; the body length reaches 10cm or more, and they are fed 2 to 3 times a day. After that, as the seedling body weight increases and the body length grows, the feed particle diameter gradually increases. The number of feedings can be reduced to 1-2 times a day, and the feeding amount is about 80% of the satiation rate, and there can be no residual baits. When the water temperature is lower than 10°C or higher than 22°C and the feeding is poor, the feeding frequency and feeding amount should be reduced.
3 water quality management. When the water temperature is above 22~23°C for a long time, it is necessary to increase the amount of water exchange and take cooling measures. The temperature difference should be controlled within 0.5.
4 disease prevention and control. The pool should be patrolled several times a day to observe the status of the fish and check for signs of darkness, surface ulcers, redness, and abnormal movements, especially when feeding fish. If the disease is found, treatment and isolation measures should be taken promptly.
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