CATDOLL : CATDOLL: How to raise goldfish fry well?

How to raise goldfish fry well?

The little goldfish is very weak, so you need to pay attention to several things when raising it.

The key to raising goldfish is water. Goldfish live in water, so you must arrange the water well. Goldfish often die because of frequent water changes or not changing the water for goldfish. If you use tap water, expose it to the sun for two or three days before use to let the chlorine in the water escape. When changing the water, leave some old water, because goldfish are very weak, and the water temperature cannot change too much. It is better to change the water once a week or so.

Be careful when feeding goldfish. Be careful not to feed them too much. It is best to feed them live fish worms. Goldfish are greedy and often die from indigestion caused by eating too much.

Always observe the goldfish. If you find that it is in poor spirits or floating on the water, change the water immediately. If you see most of the goldfish floating on the water to breathe, give them a bath with 5% light salt water.

In addition, it is best to put some green algae, water plants or bottom stones in the fish tank, which can not only decorate the fish tank, but also play a role in photosynthesis. You can also use the feces of small goldfish to form a wonderful symbiotic relationship and play a bactericidal role.

By doing the above things, you can raise the goldfish well.

How should goldfish fry be raised? What should you pay attention to?

Goldfish breeders have long had the experience of "raising water first before raising fish", which shows that the quality of water will directly affect the normal growth and development of goldfish. The purpose of changing water is to remove dirt (garbage, fish feces, leftover feed, stale impurities) in the water, keep the water clean, adjust the water temperature, and increase oxygen in the water, thereby stimulating the growth and development of goldfish.

If you want to raise goldfish well, you must have a preliminary understanding of fish water:

1. Raw water

Refers to tap water or well water that has just been released and has not been aired. The water temperature is often quite different from the water temperature in the fish pond (tank), and it contains more chlorine, which is extremely harmful to goldfish.

2. New water

It is tap water, well water, or spring water that has been dried and left to settle for about 2-3 days, and has a clean water temperature equal to or similar to that of the water in the fish pond (tank).

3. Chen Shui

It is the dirty water at the bottom of the fish pond (tank) containing feces and dirt, including the feeding water in the pond (tank) that has not been changed for a long time.

4. Old water

It is a general term for the clean water in the fish pond (tank) that is light green, green, old green or green-brown. The light green water is the best. There are more green algae floating in the old water, which are also a good supplementary feed for goldfish. There is less organic matter in this water that has been decomposed and more dissolved oxygen. Fish are often raised in light green and clean old water. The fish raised in this water have the strongest appetite, strong body, bright color and fast growth.

5. Return clean water

If you find that the old green water in the pond (tank) suddenly turns into clear water, and many green algae settle at the bottom of the tank, this phenomenon is called returning to clear water. This kind of water is easy to cause fish diseases and needs to be replaced completely.

(I) Under normal water changes, especially in hot summer, you only need to use a hose to gently suck out 1/10-1/5 of the feces and dirt at the bottom of the fish pond (tank) along with the stale water, remove the dust and floating feces on the water surface, and then slowly inject new water of equal temperature along the wall of the pond (tank) to keep the water clean. This water change method is not easy to hurt the fish, the method is simple and safe, and is most suitable for home fish tanks or small pond fish breeders.

(II) Partial water change This water change method is mainly carried out in two situations. One situation is in the hot summer and early autumn, when the water in the fish pond (tank) has been changed for only a few days and the water color turns green very quickly (due to insufficient feed), and the water quality is still clean, in order to prevent the goldfish from scalding their tails, all the goldfish in the pond (tank) can be taken out, and then the water in the pond (tank) can be rotated in a spiral shape. After it is still for a while, 1/3-1/2 of the dirt and stale water in the center of the pond (tank) can be sucked out with a rubber tube, and then new water of equal temperature and volume can be injected, and the goldfish can be taken back to the original pond (tank) for breeding.

Another situation is that the water in the pool (tank) has been changed only a few days ago, and the water color is still good, but because of excessive feeding that day, the fish appear to float, and emergency measures must be taken. The method of changing water is the same as mentioned above.

If it is a large fish pond in a fish farm, there is no need to scoop the goldfish out. Instead, use a foldable net to surround the fish and gently rotate the water in the pond with the net for tens of seconds. Wait for the water to stand still for a moment and then open the drain gate to slowly release the water or use a straw to remove excess fish worms, feces and stale water in the center of the pond (tank), or use a fish net bag to scoop out excess fish worms from the center, then release 1/4-1/2 of the stale water, and finally inject an equal amount of new water of the same temperature. This method is commonly used in fish farms or homes as an emergency method when too much food is fed.

(III) Complete water change This water change is often combined with turning the pond (tank) and selecting young fish or adult fish. It is often used when the water quality is seriously deteriorating or moss is too long, and the fish are too dense. There are two specific methods:

1. If there is no spare pool, you have to put all the goldfish into a basin or put the net cage into the water of the adjacent pool for temporary storage, and add an aerator to the basin or net cage to increase oxygen. Then, brush off the moss on the wall of the original pool, rinse it thoroughly, refill with new water of the same temperature, let it stand for a while until the water temperature is equal, and then put the fish into the original pool (tank).

2. If there is an empty pool and new water, just scoop all the goldfish into a basin or net cage, select and handle them separately, and move the goldfish into the new water for breeding after the water temperature is equal for the pools that need to be divided. This water change method should pay special attention to the water temperature, and it is best to choose a sunny morning before 9 o'clock. However, this method is generally only suitable for adult fish or larger young fish, and is not suitable for fry. If conditions permit, before completely changing the water, you can first fill the spare pool (tank) with water, and then scoop the fish directly into the spare pool (tank). In this way, the water temperature changes little, and the fish can easily adapt to the new environment, so that the fish will not suffer from being squeezed in the basin or net cage. This water change method is generally carried out once every half a month in spring and autumn. In summer, when the weather is hot and the water temperature is as high as 28℃ or above, the water color is very easy to be dark and the water quality is very easy to be turbid, and the water should be completely changed once every 5-7 days. In winter, the water temperature drops to around 4℃, goldfish move slowly, their appetite decreases, and the water quality is not easy to deteriorate. Unless there are special circumstances, all the water is generally not changed.

(1) Spring: The temperature in spring is suitable, and it is the breeding season for goldfish and koi. The breeding work of goldfish mainly focuses on the spawning of broodstock and the care of fry. When the water temperature is between 18 and 22 degrees Celsius, broodstock will chase each other in breeding activities. Generally, broodstock are replaced with new water in the afternoon or evening, and spawning activities will occur at dawn the next day. Goldfish before giving birth should be kept in green water, and the sexual activity of broodstock can be controlled by the stability of water color and water quality. After spawning, broodstock should be kept in light green water, or some green water can be added to clear water to maintain the normal development of broodstock gonads. Generally, the second spawning can be carried out after 7 to 10 days. During the breeding period, broodstock should be fed with live bait as much as possible. In the Jiangnan region, there is a plum rain season around June every year. It is rainy and cloudy, and various harmful bacteria and parasites multiply in large numbers. This is the season for goldfish to get sick. Both broodstock and young fish should be raised in green water, with fewer water changes, stable water quality, and minimal stimulation. Feeding should also be reduced, especially on days with low air pressure and hot weather. Pay special attention to the amount of feeding. If you encounter sick goldfish, you should isolate them in time and use drugs to prevent them in advance.

(2) Summer: In summer, the temperature is high, and the water temperature is mostly above 25 degrees Celsius. The harmful bacteria and parasites in the water are significantly reduced, and goldfish rarely get sick. Due to the high water temperature, the algae in the water increase significantly, the water turns green faster, and the dissolved oxygen in the water decreases. At this time, the focus of feeding is to prevent goldfish from heatstroke and hypoxia. Around noon, use shade nets or reed curtains to cover 2/3 of the pond to prevent the water temperature from rising too quickly and provide a place for the fish to escape the heat. At night, pay more attention to observation, especially around 3-5 o'clock in the second half of the night, which is the time when fish are most likely to suffer from hypoxia. If you encounter a fish pond with severe hypoxia, add water or change the water in time. If there is an oxygenator, it should be turned on in time after dusk. If you find that the feeding water turns green or there are fish with scalded tails during the day, you should change the water in time. For koi raised outdoors, pay more attention to changing the water in time, and turn on the oxygenator in the evening.

(3) Autumn: In autumn, the water temperature is suitable, and the young fish produced in spring have reached the adult stage. At this time, the focus should be on increasing feeding to keep the ornamental fish plump and beautiful, so fattening is the focus of breeding in autumn. When the water temperature is between 18 and 22 degrees, harmful bacteria in the water multiply vigorously. Observation and drug prevention should be strengthened to avoid large-scale disease and death of ornamental fish. Since autumn rarely has dozens of days of continuous rainy weather like the mildew season, the disease degree of ornamental fish is relatively mild. However, due to the suitable water temperature, autumn is the season when ornamental fish are more likely to get sick. As long as active prevention is taken, they can generally get through it safely.

(4) Winter: In winter, the temperature is low, the water temperature is mostly below 10 degrees, and the morbidity of ornamental fish is low. At this time, it is difficult for the fish to grow longer, but the fish can become fatter. The ornamental fish have already developed and this is the busiest season for the purchase and sale of ornamental fish. The key point of breeding during this period is to maintain stable water quality and keep the ornamental fish healthy. When the water temperature is low, the goldfish should be moved indoors or to a greenhouse for the winter, or the water level of the fish pond should be deepened to 40-50 cm to prevent the fish from frostbite. In the north, since the temperature is often below 0 degrees, ornamental fish must be moved indoors or to a greenhouse for the winter. For goldfish that spend the winter indoors in the north, it is best to keep the room temperature above 7 degrees so that the goldfish can forage for food. Feeding can be done every other day or every three days. If the water temperature is raised to 18-22 degrees, the goldfish can reproduce in advance in the greenhouse.