How to feed the koi fish fry bought home?
1. When koi fish seedlings just hatch, if the fine needles are very delicate and can't swim in balance, they just twist their heads vertically for a short distance and attach to the wall of fish nests or fish ponds in koi fish, so they are very fragile and won't eat, and only absorb nutrients in yolk capsules to maintain their lives. After the yolk sac of koi fish fry is gone, or after 3 days, koi fish fry can be properly artificially fed. At this time, you can choose to feed koi fish food: the crushed egg yolk is stirred and mixed with water, and the soybean milk is evenly sprinkled in the koi fish fish pond, with more times and less quantity, so that every koi fish fry can eat.
2.5cm koi fish fry can be fed with artificial feed or plankton such as red worms and Chlorella. Generally, it can be fed 34 times a day.
3./kloc-koi fish fry above 0/0 cm can be fed with artificial feed and insects, such as shrimp, crab meat, bread worms, etc., but feed less. When feeding these live baits, they must be disinfected and washed, and it is best to remove the head and tail. Feed less, and feed more will probably lead to koi fish's indigestion.
Why can't koi fish, who bought it home, die easily?
1. Choosing fish is the key to raising koi fish well. Buying small fish with the size of 1020 cm has the highest success rate. When choosing fish, it depends on whether the water is too muddy and whether there are a few rotten fish in the school. If this is the case, you don't have to look at the fish in this pool.
2. Never buy fish with short head, blunt mouth, thin body or bloated body. Choose a fish with a well-proportioned figure, active swimming posture and bright eyes. Cheap fish, the color is generally not very good.
3. In the next few days, the water is the easiest to muddy. It is best to change the feed water of 1/22/3 every day. If your fish container is too big and it is difficult to change such a large amount of water, you can temporarily raise it in a suitable small container for two weeks. When you see that the state of the fish is beginning to improve, you should fish it into a fixed container, and remember to balance the water temperature of the two containers before fishing. Whether it is temporary or fixed, it is best to put enough activated carbon into the water filter to minimize the amount of harmful substances. After keeping the fish stable, if you keep koi fish in small containers such as aquariums, depending on the water quality, it is best to change the feeding water of 1/8 1/3 every four or five days, which is very beneficial to the healthy growth of koi fish and keeping the water clean.
4. In the whole process of raising koi fish, it is generally unnecessary to put preventive drugs, and blindly applying drugs will only kill the fish. When individual sick fish are found, they should be isolated in time, observed for several days, and then treated separately. Activated carbon should be taken out when the medicine is administered, and the medicine should be light but not strong. Attention should be paid to observation. Once the fish is found to have an unwell reaction, water should be changed in time. Commonly used drugs are; Huangpai Yu Bao panacea (mainly composed of methyl blue) yellow powder and potassium permanganate (just adjust the bath water to pink). Koi fish should be fed two or three times a day, and the feeding amount should be based on eating the feed within ten minutes each time. It is suggested that you buy bulk spices (a mixed granular feed, brown with fishy smell).
How to prevent common fish diseases in koi fish?
Fish diseases often encountered in the process of aquaculture in koi fish mainly include water mold, enteritis, gill rot, vertical scale disease and so on. Control methods are as follows:
1. Hydromycosis, also known as white spot or dermatomycosis _ Symptoms: the diseased fish is covered with gray cotton wool and hairless hyphae.
Prevention and treatment methods of fish diseases: ① soaking malachite green in 0.2ppm-0.4ppm; ② 0.5ppm formalin immersion; ③ 400ppm-500ppm of salt and 400ppm-500ppm of sodium bicarbonate are mixed into a mixture, and the sick fish are intensively applied in a small pond.
2. Enteritis, symptoms: black body color, red and swollen anus _ abdominal swelling, yellow mucus overflow in abdominal cavity.
Prevention and control methods of fish diseases _: ① Furazolidone 0. 1ppm-0.7ppm soaking _ feeding with oxytetracycline mixed bait; ② Furazolidone 1 g-2g/100kg bait was taken orally for 3 days; (3) A small amount of garlic head is mashed and mixed with bait for feeding for 3 days.
3. gill rot, symptoms: the diseased fish moves slowly, the body color and head are black, and in severe cases, the gill filaments rot and the gill cover has a small transparent window.
Prevention and treatment methods of fish diseases: ① soaking in bleaching powder 1ppm; ② soaking in nitrofurazone 1.5ppm-2ppm; ③ 0.3ppm erythromycin immersion; ④ 0.5-0.7 ppm copper sulfate is spilled.
4. Vertical scale disease, also known as scale stand-up disease or loose scale disease, symptoms: the surface of the diseased fish is rough, the scales of the whole body stand up like a loose ball, the scales are swollen at the base, and there is exudate inside.
Prevention and treatment methods of fish diseases: ① Furacillin 1ppm treatment; ② Feeding in water with 0.5% salt, stopping eating for 2 days, and feeding each tail with 0.6 g sulfadiazine with bait every day; (3) soaking in 2% aqueous solution of salt 10 minute; (4) Erythromycin 2.0ppm-2.5ppm soaking for 30 minutes -50 minutes.