CATDOLL : CATDOLL: How to keep freshwater fish at home

1. How to raise freshwater fish at home

It is actually very simple to raise freshwater fish well, you just need to pay attention to a few points.

The first and most important thing is water. Fish cannot live without water. This is a law. They cannot live without water for their entire lives. So keeping good water is the key. Tap water in cities cannot be used directly for fish because chlorine and bleaching powder are added to tap water. If you directly replace tap water with fish, they may die from chlorine poisoning, or contract white spot disease. Tap water must be trapped before it can be used for fish. Trapping water means filling an open container with water, then exposing it to the sun for two days or more to allow the chlorine to evaporate on its own.

Also, you need to pay attention to whether you are raising tropical fish or cold-water fish. If you are raising tropical fish, you need to heat them in the winter.

When changing the water for fish, you should also pay attention to the temperature difference of the water. The temperature difference between the water in the fish tank and the water to be replaced should not be greater than or two degrees. If the temperature difference is too large, the fish may turn upside down due to the alternation of hot and cold, and may be directly killed.

Another point of experience is that when changing the water, do not change all the water in the fish tank, change one-third or one-quarter each time. Leaving some old water will help the fish adapt better.

The second point about feeding is that it is best to feed fish at regular times and in fixed quantities. Do not feed too much. If you feed too much, the water will become dirty and the fish's resistance will decrease, making them prone to disease. In severe cases, the fish will suffer from gastroenteritis, which is a fatal disease in ornamental fish because it is really difficult to cure.

2. How to raise freshwater fish? For example, mandarin fish, mullet, silver carp, crucian carp, Chinese sturgeon?

1. Water temperature: Generally, the temperature for tropical fish is 20-32 degrees. The temperature for aquatic plants is 18-28 degrees. The temperature should not change by more than 4 degrees per day. When heating, 2-3 degrees per day is appropriate. When treating diseases, the temperature should be raised to 30 degrees.

2. Release the fish: The first week is the most dangerous when changing the environment. Soak the whole bag in the appropriate temperature for 30 minutes. Mix the water for 20 minutes and let the fish swim out by themselves.

3. Water cultivation: The most important thing is to cultivate bacteria and stabilize water quality. At least one week, preferably one month. In order to maintain ecological balance, it is best to add 5 new fish per month.

4. Bacteria fertilizer: Using Jinbaobei microbial fertilizer to raise fish can not only promote the accelerated reproduction of microorganisms, plankton, and small animals in the water, but also the effective bacteria in it can promote the expansion and propagation of various beneficial bacteria. In addition, the effective live bacteria in the bacteria fertilizer can also promote the decomposition of feed residues and excrement in the water, purify the water body, and improve the water quality.

5. Add water: Natural water is the best; the second best is tap water with water stabilizer; the third best is to let the tap water stand or pump air for three days, but not more than seven days.

6. Lighting time: 6 to 8 hours continuously. Too much, strong: it is easy to oxidize the water quality, turn the water green, and grow moss and algae. Too little, weak: insufficient photosynthesis of water plants, poor growth. The area of ​​water plants accounts for about 15 to 20% of the bottom area.

7. Maintaining full water level is both beautiful and does not splash water, reducing the sound of water flow. Do not lower the water level by more than 3 cm, which will cause the water quality to change too much and become less stable.

3. Freshwater fish farming technology and fish pond management, which freshwater fish grows fast and big

1. Select seedlings: Take grass carp as an example, select seedlings that swim quickly and have a dark grass green body color. 2. Water quality management: Sprinkle bleaching powder once every half a month in the entire pond and remove feed residues in time to avoid water pollution. At the same time, patrol the pond frequently to observe the activities of grass carp. 3. Prevent fish diseases: Disinfect and vaccinate the fry before stocking. After stocking, control the stocking density of the fry and disinfect the feed.

1. Freshwater fish farming technology and fish pond management

1. Seedling selection

Taking grass carp, a farmed freshwater fish, as an example, it is advisable to choose grass carp fry with dark grass green body color and fast swimming speed. Do not choose fry with black body color or diseased fry. You can observe the swimming conditions of the fish in the fry pond. Usually, fry that crawl to the edge or swim alone are mostly sick.

2. Water quality management

(1) Sprinkle quicklime regularly

Generally, 20 kg of quicklime is sprinkled per acre of water surface and per meter of water depth, or 1 PPM of bleaching powder is applied and sprinkled throughout the pond. This can be done once every half a month.

(2) Planned water addition and replacement

New water should be injected once every 10 days, with 20-30cm injected each time. After mid-July, the water can be changed once depending on the actual situation, with the water replacement amount being 1/2.

(3) Start the aerator every day

Usually from June to mid-August, grass carp are prone to lack of oxygen and floating on the surface. Therefore, the aerator can be turned on for 2-3 hours at noon on sunny days, 3-4 hours in the early morning, and once in the middle of the night on cloudy days to prevent the fish from floating on the surface.

(4) Careful pond inspection

Patrol the pond frequently to keep abreast of grass carp's activities and feeding conditions, as well as changes in water quality, so as to prevent diseases early and treat them early.

(5) Clean the pond

Clean up the debris in the pond in a timely manner and remove the leftover feed for grass carp to avoid water pollution after feed sedimentation.

3. Fish disease prevention

(1) When grass carp weigh 70-150g and are 10-20cm long, they are prone to acute infectious diseases. Therefore, it is necessary to reasonably control the number of fry and catch them at the right time. Generally, the density of fry can be controlled at 220,000-300,000 fry/1,000 square meters. Too high a density will easily increase the incidence of disease.

(2) Ponds can be disinfected regularly with high-quality photosynthetic bacteria to prevent harmful substances such as hydrogen sulfide and nitrogen oxides produced by feces in the pond from polluting the water source, causing infectious diseases to break out among fish fry in a poor water quality environment.

(3) Before stocking, the fish should be placed in a 0.01-0.02% potassium permanganate solution for 3 minutes to kill parasites or pathogens on the surface of the fish. The disinfected fish should then be placed in a net cage and injected with the vaccine. Generally, fish weighing about 125g should be injected with the triple vaccine 0.2m and released into the pond on a sunny day.

(4) Generally, 1kg of fish feed needs to be disinfected with 5-10ml of chlorine bleach solution.

4. Feed matching

(1) For every 100 kg of a mixture of 50% rice straw, 25% rice bran and 25% bean cake, add 10 kg of flour scraps as a binder. The crude protein content of the feed is 23.35%, and the feed coefficient is 2.8. Generally, each fish is fed about 0.05 kg.

(2) Rice straw 50%, rice bran 22.5%, bran 5%, soybean cake 15%, fish meal 5%, bone meal 1%, salt 0.5%, vitamin additive 1%. The crude protein content of the feed is 18.78% and the feed coefficient is 2.4.

(3) Flour 30%, rice bran 8%, bran 38%, soybean cake 10%, fish meal 10%, yeast powder 2%, premix 2%, feed coefficient 1.9. If green fodder is added, the feed coefficient is 2.2.

(4) Flour 30%, fish meal 10%, soybean meal 15%, bran 25%, rice bran 20%. On the premise of ensuring that the total amount of basic feed remains unchanged, you can add sweet potato powder 12%, salt 0.5%, growth hormone 2%, and calcium hydrogen phosphate 2% according to actual conditions. The feed coefficient is 4.8.

2. What freshwater fish grows fast and big?

1. Freshwater fish such as grass carp, black carp, black carp, catfish, silver carp and bighead carp grow fast and grow big. Among them, black carp (Channa chub) is a fast-growing fish with high economic value. Generally, it can weigh 0.5-0.7kg after being farmed for 8-9 months. It has a ferocious temperament and is a carnivorous fish. It likes to live in shallow waters with lush aquatic plants. It is very popular among consumers because of its delicious meat and rich nutrition.

2. In a broad sense, fish that can live in fresh water with a salinity of 0.3 parts per thousand can be called freshwater fish. Generally, freshwater fish can be classified according to the salt concentration in the water. Freshwater fish can be divided into primary freshwater fish, secondary freshwater fish and peripheral freshwater fish. Primary freshwater fish refers to fish that can only live in fresh water throughout their lives, such as arowana, while secondary freshwater fish refers to fish that live in fresh water most of their lives but occasionally move in semi-fresh brackish water or sea water, such as potbellied fish. As for peripheral freshwater fish, they refer to fish that live in sea water or semi-fresh brackish water, but from their life history, they will move in fresh water or semi-fresh brackish water, such as marine fish that occasionally enter rivers.

3. Most freshwater fish have special colors and patterns, or their body color is consistent with the surrounding environment, mainly used to hide themselves or confuse enemies and prey, to protect their own safety or to attack prey. Usually in shallow water, the fish's back is usually blue or green, and in deep water, the body color is often dark red or black, and the body color is very gloomy.

4. Freshwater fish often feed on plankton and organic debris. Most of them are herbivorous and omnivorous, but a small number of freshwater fish are carnivorous. However, due to environmental pollution, excessive reclamation, construction, damming, overfishing and other problems, the natural habitat and water quality of freshwater fish have been damaged. About 1,800 species of freshwater fish are endangered, and some species have even become extinct, which disrupts the food chain and affects the ecological balance. Therefore, it is necessary to protect threatened freshwater fish species.