CATDOLL : CATDOLL: I want to raise small koi, what size fish tank should I use?

1. I want to raise small koi. How big a fish tank should I use? Please advise.

Take the Koi with a body length of 15 cm to 20 cm as an example in a general aquarium:

60cm×30cm×15cm can hold 6 koi;

90cm×30cm×50cm can hold 8 fish;

110cm×30cm×50cm can hold 10 fish.

Suggestion: The fish tank for raising koi at home should be as big as possible if conditions permit. However, it should be at least 1.2 meters to facilitate the growth of koi and to appreciate their charm.

2. How to raise koi fish at home?

Fish tank or garden pond? For fish tank, prepare filtration equipment, oxygenation equipment, lamps, and then cultivate the water first.

3. What should you pay attention to when raising koi at home?

1. Preparation before and after bringing koi into the house

When introducing koi, koi lovers should be prepared, which is of great significance to whether the koi can survive and quickly adapt to the environment:

When raising fish at home, the cement pool needs to be soaked to remove alkali, change water and cultivate water. When cultivating water, it is best to put in thick green water for a few days (the purpose is to accelerate the growth of moss) before raising fish.

2. The protective layer (mucus) on the surface of the imported koi is easily scratched and damaged after transportation, especially after long-distance bumps. Therefore, before the fish arrives at home, you should prepare several tanks or large basins or small fish ponds at home, put 1/2 of the pond (tank) with new water, and when the purchased fish arrive, put them in the tank, basin or small pond first, and bathe them with 1%-2% salt water or 10-20 mg/L furacilin or 5-10 mg/L potassium permanganate solution for 5-15 minutes (the time should be flexible depending on the size of the fish), and then put them in the breeding pond for rest (if there is green water, it is best to add a little in the pond), and put furacilin powder in the breeding pond at a ratio of 2-3 mg/L to reduce the incidence of fish diseases. Do not pour the water in the original plastic bag after long-distance transportation directly into the breeding pond.

3. Do not feed the koi on the first day after they enter the house, and do not feed or feed very little on the second day. The amount of food you feed thereafter should be gradually increased depending on the koi's appetite. This will help prevent the water quality from deteriorating and will turn green quickly. Do not feed all the koi at once, as this will seriously affect the koi's health.

4. How to raise koi? ? ? ?

When raising koi, you must have a powerful filtration system and be careful not to put any decorations in the tank. Koi swim very fast and any decorations may cause harm to them.

As for food, it is best to use granular feed specially made for koi, which is nutritionally complete and fish also like to eat it.

Never feed mealworms, bloodworms, or small fish and shrimps. On the one hand, these foods are not nutritionally complete. On the other hand, these foods often carry germs that can harm koi.

If conditions permit, it is recommended that you raise more koi in a large tank. If conditions permit, the bigger the tank, the better. The majestic posture of koi will be more imposing when they are in groups.

The breeding age of koi is generally 3-8 years old, and the weight is more than 1.5 kg. Select fish with plump and round appearance, round head, long body, no deformity, bright color, uniform color, symmetrical appearance, no damage, and no disease as broodstock. From the appearance, the female fish has a short, thick and plump body, a swollen abdomen, and a rounded end of the pectoral fin. The male fish has a slender body, with a slightly pointed end of the pectoral fin, and a number of white "chasing stars" on the first fin ray and gill cover of the pectoral fin. The breeding period of koi is similar to that of ordinary carp. Generally, from April to May each year, when the water temperature is stable above 16 degrees Celsius, female and male koi can be selected in a ratio of 1:2 and put into the prepared pool. A disinfected fish nest is placed in the pool in advance, and it is allowed to spawn on its own. After observing that the spawning is completed, the broodstock are caught, and the fish nest is left in the pool for incubation. After 5-7 days, the fry are hatched and cultivated. Koi can eat all the food thrown into the water. Don't let the food sink to the bottom. Twice a day is enough, just like goldfish. Don't feed if the koi can finish it in one go. Don't feed too much.

(I) Symptoms: The edges of the fins of the diseased fish appear milky white, followed by rot, resulting in incomplete fins, especially the tail fin. Sometimes the connective tissue between the cartilages of each fin ray splits, sometimes the tail fin becomes broom-shaped, and in severe cases the entire tail fin rots away. The scales of the diseased fish are normal, or some scales fall off. The tail fins of some diseased fish are congested and appear as bloodshot lines.

2. Pathogen: Probably bacteria, the name of the bacteria is yet to be identified.

(III) Hazards and prevalence: This disease can occur in all fish of the current year and in spawning parent fish, and is more common in large fish. It occurs all year round, and often causes the death of sick fish in summer. When the water temperature is low, the entire tail fin rots, but the sick fish is still alive, which reduces the ornamental value of goldfish. Goldfish raised at home are prone to this disease. This disease occurs in various parts of my country.

(IV) Prevention and control methods:

1. Apply 1% malachite green aqueous solution to the broken fins once a day for 35 consecutive days to prevent water mold infection and promote wound healing.

Spray furazolidone or furazolidone at a concentration of 1ppm-2ppm throughout the pond.

2. Apply furazolidone or rivanol 1% aqueous solution once a day for 3-5 consecutive days. Then spray the whole pool with furazolidone or furazolidone at the above concentration.

3. Spray the whole pond with Livanol. It is suitable for precious species, and the concentration is the same as that for preventing and treating gill rot.

4. While using drugs for treatment, you must feed water fleas, sword water fleas, earthworms and other animal feeds to strengthen nutrition, so as to enhance disease resistance and tissue regeneration ability.

force.

5. If part of the tail fin is rotten and incomplete, it should be cut off with scissors to make the fin rays flat, and then treated with the above-mentioned drugs. Usually after 10-15 days, the cracked fin rays can heal, and the cut fin rays can also regenerate. Usually after 40-80 days, the entire tail fin can grow back. There is a mark between the regenerated fin rays and the original old fins, and the ornamental value of this fish is reduced, but it can be kept as a parent fish for breeding offspring.

Apply iodine directly to the affected area, wait for 3-5 seconds, then put it in 0.3% saline, and you will find that the tail has turned into a clean yellow-white color. It has been decolorized. Haha, but the flocs that could not be removed disappeared in the blink of an eye. HOHO, it is not effective in three times, it is clearly eradicated in one time.

5. How to raise koi? If any fish lovers have good experience, please share it with me!

Just like raising ordinary goldfish, well, at least that's how I do it. Koi are not as delicate as ordinary goldfish. The water in the tank and the feed are the same as those for ordinary goldfish. They have stronger resistance, at least mine have never been sick. Occasionally, in addition to fish feed, you can also feed some lettuce. It's just that the water in the tank is easy to get dirty and needs to be cleaned frequently. It is recommended to raise koi in a porcelain tank. Glass fish tanks are not as good-looking as those in porcelain tanks. That's all I know, I hope it helps you.