After spawning and fertilization, take out the parent fish and add a little methyl blue to the water to prevent disease. At the same time, the unfertilized fish eggs are taken out to avoid affecting the water quality. Fish eggs will hatch within 72 hours, and the newly hatched small fish need not be fed for the time being. After a week, I have absorbed almost all my nutrients, and then I will feed some backwater or hatched shrimps to make them open their mouths.
Adult fish time
Small fish can grow into adult fish in about 3 to 5 months. People in the city use tap water to raise tropical fish, which is basically neutral water. The hardness and pH meet the requirements of raising tropical fish, so don't worry too much. However, when using tap water to raise tropical fish, chlorine gas must be removed. The main methods are drying method and chemical method.
Selenium drying method
That is to say, it can only be used after two days in the hot sun or four to six days in the dark.
Chemical method
That is to say, sodium thiosulfate is used to remove chlorine, and the ratio is 10 kg of water 1 g of sodium thiosulfate, which can be used after stirring and dissolving.
Change water
Tropical fish constantly excrete feces, and the remaining Er substances in water are constantly oxidized and rotted, which will produce harmful substances, make the water quality worse, affect the normal breathing of tropical fish, and make the fish sick or even die. Therefore, tropical fish should always change water in time to keep the water fresh and let the fish grow normally. Change water, partially change water, completely change water.
Partial water change: Also known as "water change", it is to suck out the fish manure, residual bait and other dirt at the bottom of the fish tank with a siphon. The water absorption should be about a quarter of the water in the tank, and a large fish tank can absorb a certain proportion less. In short, it depends on the specific situation. After the dirty water is sucked out, fresh water with the same amount and temperature should be added and dried or chemically dechlorinated. If the water temperature is low, you can add boiling water or heat the water to the water temperature in the cylinder with a heater, and then pour new water into the cylinder. Twice a week in autumn and winter is the best time to replenish water; Three times a week in spring and summer is appropriate.
All water changes: When there is a lot of dirt in the tank, water plants and bottom sand need to be cleaned again, all water changes. Take out all the equipment in the fish tank, take out the aquatic plants, take out all the fish, temporarily put them in other containers with the same temperature as the raw water, scrub the tank wall and bottom with sponge or emery cloth, and then suck out all the water. If necessary, rinse again with a small amount of concentrated brine, and then rinse with clear water. The bottom sand and aquatic plants should be washed once, and it is best to wash the bottom sand with strong salt water, and then rinse it before loading it. After adding fresh water, you should wait two or three days before putting the fish back in the aquarium. Even if it is chemically treated water, it is best not to put fish in it immediately to avoid accidents in new water. It is advisable to change water every three to four months, but if the water quality changes, it should be changed at any time.
water temperature
Temperature is the most important condition for tropical fish to survive. Tropical fish are narrow-temperature animals and are extremely sensitive to temperature. If the temperature is not right, they will die quickly. The living water temperature of the Black Devil should be between 23-28℃, and the suitable growth temperature is 25℃. The suitable water temperature for young fish should be between 26-28℃, and it should not exceed 4℃ day and night, otherwise it will affect the survival and growth of young fish. The water temperature should be kept constant during breeding, which will be more conducive to the production of parent fish, the hatching of fish eggs and the growth of young fish. Before raising fish, we should make good preparations according to the requirements of fish on the water temperature and PH value of feeding containers, aquatic plants, sand and gravel and feeding water.
1. Water temperature adjustment: After purchasing the fish, put the plastic bag containing the fish directly into the fish tank for about 20~30 minutes, then open the bag and let the fish flow into the fish tank with the water. Next, the fish needs to be carefully raised and managed.
2. Bait feeding: Some fish lovers often die because they are greedy for fish and feed all kinds of excessive bait. As we all know, fish are not easy to starve to death or swell to death, or fish die because of the deterioration of water quality caused by excessive bait. Therefore, feeding must follow the four principles of timing, fixed point, qualitative and quantitative. Generally speaking, it is more appropriate to feed the compound feed twice a day, 9: 00 am-10: 00 am and 4: 00 pm-5: 00 pm. Live bait such as fish worms can be fed at once in the morning. For larvae, it is necessary to ensure that there are open bait such as rotifer, paramecium or egg yolk in the tank. Pay attention to put the earthworm in a perforated plastic box and hang it in the water when feeding it, so that the fish can eat freely. If you feed other chopped animal bait, it is best to feed it in a hanging basket; Feeding should have a fixed position, so that fish can concentrate on eating and reduce waste; The bait must be fresh and free from spoilage; The feeding amount should meet the needs of fish growth, and there should be no extra nutrition. According to the situation of fish in the box or pond, the daily feeding amount is generally about 2-4% of the total weight of fish, or the comprehensive judgment is based on eating 30-60 minutes after feeding. The specific feeding should be appropriately increased or decreased according to the season, climate characteristics, water temperature, water quality differences and fish feeding intensity. Don't throw more or less, don't throw it for several days or throw it together for several days. If you can't feed the fish every day when you go out, feed it normally, and change fresh water before you go out to ensure clear water quality and sufficient oxygen. Hunger for a few days has no effect on the health of fish. Never feed the fish for several days, causing the fish to die.
The following examples are some common diseases in the dark Lord culture: 1. Trauma: The mucous membrane of fish is very delicate. If you don't pay attention, it will hurt the fish, and it is easy to be infected with mold and bacteria. Treatment: a. Apply mercuric chloride directly to the trauma (avoid applying it to the eyes), 1, 1-2 times a day. B. Soak the sick fish in the dilute solution of tetracycline, oxytetracycline and penicillin with the concentration of 1-2ppm. C, daubing erythromycin ointment and tetracycline ointment on the affected part, and then soaking in tetracycline liquid medicine with a concentration of 2ppm. 2. Cucumber disease (white spot disease): Ill fish often rub their bodies on aquatic plants and stones, showing white spots on their bodies and fins. The disease spreads quickly, and if it is not treated in time, it will often die in large numbers. Treatment: A. Raise the water temperature, and the pathogenic insects will leave the fish. This parasite is easy to die without a host. B. Put the sick fish in water at about 28-30℃, and change the water (add a little salt) for the sick fish the next day until the fish is cured. C. Soak the sick fish in 2PPm methyl blue solution for 6 hours every day. D, dissolving acidic quinine in hot water, putting it in water at 28-30 DEG C, and putting the sick fish in. 3. Water mold: It is found that fish have "white hair". After the illness is serious, the muscles of the affected area rot, the appetite decreases, and eventually they die. This disease can occur all year round. Treatment: A. Soak the sick fish in 3% salt water once a day for 5- 10 minutes each time. B. Soak in 2ppm potassium permanganate solution and 5% salt solution for 20-30 minutes once a day. C, soaking the sick fish in malachite green solution with the concentration of 1-2ppm for 20-30 minutes, twice a day. D, soaking the sick fish in 5ppm of furacilin solution until the sick fish is cured.
4. Rotten fin disease: In the early stage, the fins turned white, then the wound secreted mucus, and the fins rotted, leading to the death of the sick fish. Tail fin, dorsal fin and ventral fin may rot. Treatment method: A. Soak the sick fish in 5% salt solution until it is cured. B, put 5-65438+ 10,000 units of penicillin into every 10 kg of water to soak the sick fish until it is cured. C.5ppm furacilin 5% salt soaked sick fish. D. Soak the sick fish in salt water and potassium permanganate (2ppm). 5. rotten mouth disease (cotton mouth disease): a disease that turns white around the fish mouth, also known as cotton mouth disease or white mouth disease. Treatment: Add 5-65438+ 10,000 units of water-soluble penicillin to every 4 kg of water in the tank. It can also be treated with chlortetracycline. The aquarium needs disinfection. The tank containing sick fish and the fishing net containing sick fish can be soaked in 15% formaldehyde solution. 6. Trematosis: When fish get sick, they will swim around the water tank at an alarming speed. Treatment method: put the sick fish into formalin aqueous solution, and put formalin 1CC into every 4 kg of water. After the sick fish is soaked in 10~20 seconds, it is immediately taken out and put back into the original water tank. Twice a day, 2 13 days can cure. 7. Fish lice disease: the skin of the sick fish is inflamed and the skin is ulcerated. When parasites are attached to fish, the fish will rub the glass with their bodies. Treatment method: put the sick fish in 1.0- 1.5% salt water, and drive off parasites after 2 13 days. 8. Squamous disease (pinecone disease): The scales of diseased fish stand up like pinecones. Treatment: A. Soak the sick fish in tetracycline aqueous solution with a concentration of 50,000 units twice a day, each time 1 hour. B. Mix 2% sodium chloride solution with 3% sodium bicarbonate solution, and take medicine bath twice a day, each time 10 minute. C. Add 0.5g chloramphenicol to every 40kg of water for immersion bath. 9. Pepper disease: Small yellow powder will appear on the body and fins of sick fish, just like pepper. Treatment: fish can be cured in about 2 13 days by putting it in 5% salt water. Changing water frequently and keeping it clean can prevent this disease. 10. Cold: the fish is still floating on the water, and the skin and fins lose luster and the color is dim. Treatment: keep the water temperature constant, soak the sick fish in baking soda or 1% salt solution, increase the light, and make them recover gradually.