Water source conditions All rivers, reservoirs, springs, wells, etc. that meet the water quality standards for raising turtles can be used as aquaculture water for commercial ponds. The amount of aquaculture water must be guaranteed. When designing and producing a fish pond or aquaculture production plan, it should be arranged according to the amount of water supply. Smaller sources of water, such as well water, must be treated, such as sedimentation, filtration, ammonia removal, and disinfection, when they are reused. In the process of commercial fish breeding, providing stable water temperature conditions can effectively shorten the breeding cycle, speed up the turnover of capital, and bring good operational benefits to producers. Therefore, when choosing a water source, it is important to consider and clarify the law of water temperature change, and it should be possible to choose the water source with a suitable water temperature for a long time or a constant temperature. When choosing a source of water and building a pond, the energy consumed to provide water should also be considered. Long-term water flow, large water supply, and high energy consumption will undoubtedly increase production costs. From this point of view, with a reasonable design gap, the natural source of water that can naturally flow into fish ponds is better than the water source proposed at the power level, which is more economical than water sources that require multiple levels of water extraction or repetitive treatment.
The fish pond requires a fish pond area of ​​15-5m2, generally not more than 50m2. Fish pond shape: round, square, rectangular can be, round or nearly circular as well. Structure: The commercial fish breeding pond has a large area, uses more materials, requires strong strength and stability, and the production materials should be adapted to local conditions. The main body can use cement, rocks, river stones, red bricks, etc. The inner wall of the tank is smoothed and grinded with cement. Where possible, plastic or glass steel structures can be used. Depth: When raising 3-30 grams of fingerlings, the water depth is 0.7-0.8 meters, and the water depth is 30 meters. Water supply: The top water supply or the water supply in the middle of the pool can be selected for the round fish pond water supply location. Regardless of the choice, the supply nozzles should form a certain angle with the circular center line, and the impulse of the water supply can make the pool water rotate directionally. The water supply of the square pool should be on one side of the side. The same is true for octagons or polygons. The purpose is to keep the centripetal force of the fish's bait, feces and other contaminants through the flow of water, and continue to collect them at the center and discharge them. Rectangular fish ponds are provided with water outlets at two ends of the pool, and drainage must be set at the bottom of the pool. Drainage and water level control: The bottom row of drainage pools for round or nearly circular fish ponds is good, a certain slope (usually 5010-3) is made from the edge of the pool to the bottom of the pool, and the slope of the elongated pool is 1010-3-1510- 3. Regardless of the type of fish pond, it must be able to drain completely. Water level control and sewerage methods are available with plug drain gates or sleeved drain gates.
The amount of water exchange is controlled in smaller fish ponds, and the amount of water exchange in the early stage of breeding large-scale or commercial fish is 1-3 times per hour. Fish ponds with an area of ​​about 50m2, depending on the water temperature, stocking density, etc., the exchange of pool water can be controlled within 1-4 hours.
The stocking density of the stocking ponds in the flowing water pool can be referred to the textual charts. If the exchange of water does not meet the above requirements, the stocking density should be adjusted downwards according to the actual situation.
Feeding: Feeding in a flowing water pool can directly feed pellet feed into the tank. Daily feeding times and general feeding times at a suitable temperature may follow the flow cage method. The fish that is transferred to the fish pond in the market should be the ones that are fully accepting compound feed. Therefore, you can directly feed a pellet feed after the transfer. If there is no fully domesticated fish species, the mixed feed should be used or domestication should be continued for a period of time after entering the pool. When the trout is raised in a water tank, the nutrition of the trout is almost completely artificially fed, so the feeding rate is higher than that of the pond.
Daily management: According to the growth of fish and the change of water temperature, adjust the amount of water distributed to each fish pond to ensure that each pool has a good supply of water and oxygen. Always check whether there is any blockage in the inlet and outlet, remove plugs in time, and ensure smooth and balanced water flow. Remove diseased fish and dead fish in time. Pay attention to the feeding and eating conditions of the fish after each feeding, and adjust the feeding amount. If the amount of fish eaten is reduced significantly, the cause should be ascertained. It is the disease prevention response.
Flowing water pond culture is the most widely used method for farming squid at home and abroad. It has a small area, high yield, and convenient management. Its main feature is to provide stable water flow in fish ponds of fixed shapes and sizes. Ensure the production of water under the conditions of water exchange.