Koi fish are kept for a while and their color becomes dull

Today's koi fish are bred from wild carp, and the color of their bodies changes in response to changes in the environment in order to survive in the natural environment, and this characteristic has been retained. Some aquarists invite home koi fish that are very bright at first, but after raising them for a period of time, the color will become lighter and lighter, and even have no luster at all, what should I do? First of all, we must understand that the main factors of koi fish color fading are as follows:

1. Water quality. The quality of water directly affects the color change of koi fish. The water quality is too thin, and its color is often very light and fades quickly over time; At the same time, if the ammonia and other harmful substances in the water are too high, it will also affect the color of the fish, and these factors will make the body color of the fish yellow, and lack the original color and luster.

Therefore, we must pay attention to the changes in water quality in our daily life, try to adjust and stabilize the water quality, and adopt methods such as regular water change, cleaning and filtration, and maintaining sufficient oxygen. In addition, it is best to control the pH value of the water body in between, if the pH is too low, the color of the fish will fade quickly.

2. Temperature. Koi fish are ectotherms, and their color changes with the temperature of the four seasons. Koi fish is a freshwater fish and ectothermic animal, and it is not recommended to use a heater to keep the temperature, which is contrary to its growth law.

3. Illumination. It has a big impact on the fish, if the fish does not get enough natural light for a long time, no matter what you do, the color of the fish will be difficult to rise, it will always be pale or gray and lack of gloss. Normal pH, insufficient sunshine time, and low dissolved oxygen will also affect the color and luster.

In order for the fish to grow quickly, and to maintain the shine and color, the daily sunshine should be more than 50%.

4. Feed type.

Some poor koi fish feed has no color enhancement effect, and it is advisable to use koi fish feed without chemical additives.

The reason for the serious discoloration of koi is that many aquarium merchants have fed koi with a large amount of color enhancer feed, which makes the body color of koi fish very bright and beautiful. After returning home, the keeper chooses to feed the koi with ordinary feed, which will cause the bright color of the koi to slowly fade. In addition to genetic factors, the causes of discoloration of koi fish are also affected by environmental and human factors.

For example, changes in the water quality environment, changes in water temperature, water quality environment becoming turbid, and so on. In addition, the addition of pigments to the feed, the lack of nutrients in the feed or the nutritional imbalance, etc., will affect the body color changes of koi fish to a certain extent.

Solution: 1. Buy high-quality koi fish in a reputable aquarium store and raise them at home, during the feeding process, we should strengthen the management of water quality, keep the water environment clean, and the amount of dissolved oxygen is sufficient, in addition to preparing nutritious and comprehensive feed for koi, or prepare some live bait to feed to help koi brighten their body color.

2. Reasonable sun exposure also helps koi to add color.

3. Feed feed rich in protein, minerals and vitamins. In particular, eating more green plants rich in -carotene is beneficial to koi synthetic pigments, but only increases the red color, which has little effect on white koi.

The current koi fish are made of wild bai

Carp are bred and wild carp survive in the natural environment, and the color of their bodies changes with the change of the DAO environment, and this characteristic has been retained.

Environment, water quality, water temperature, light, etc. will all affect the color change of koi.

Feeding: The feed is not the same, which can also have an impact on the color change of the fish.

Koi should increase the light appropriately, which is conducive to coloring. Be sure to add live bait such as shrimp to your food. Shrimp meat contains the function of enhancing the color of fish, can be fed more appropriately, aquarium store ** brand high-quality artificial compound feed, there is a special feed for koi color, feed contains astaxanthin and carotene and other color feed, long-term feeding is beneficial to koi thick and bright.

Fish farming is done with water first, tap water can be raised for more than 2 days, and there is also a perfect filtration system to cultivate nitrifying bacteria. The reason for the discoloration of fish is the lack of sunlight and nutrition. Also, the green water retains its color very well.

Feed and light are both influencing factors, so you should pay attention to them.

Note: Personal opinion, change color will change, maybe there will be unexpected surprises.

The most attractive thing about the ornamental fish is the beautiful appearance and colorful colors, but some problems always bother the owner. For example, some ornamental fish, when they are bought, the color is very bright, but after raising it for a period of time, it is found that it begins to fade, why is this?

1. Genetic factors

The body shape and color of aquarium fish are mainly determined by their own genetic factors. At different stages of the fish's growth, its body color is also constantly changing. The juvenile fishes of goldfish and koi fish are raised to the semi-adult stage, and there is a "color change period" when the body color changes significantly, and proper feeding can make the body shape of the fish more perfect and more ornamental.

Second, environmental factors

Environmental factors are an important factor in the body color of fish. Some fish farmers can tell where they come from when they see a fish, mainly based on the difference in the shape and color of the fish. For example, the goldfish produced in Guangdong and Fujian are generally more colorful than those farmed in the north.

3. Variety factors

Variants formed by artificial hybridization. For example, the colorful red lid, the blood parrot, a heart, etc., have been artificially controlled to strengthen the mutant genes in some aspects, so that the characteristics of the fish body shape and body color have gradually stabilized. The blood parrot is a cross between the red manta fish and the fire mouth fish of the cichlid family, and has been selected and optimized to form an independent ornamental fish species.

Fourth, the way to prevent fading

The color of ornamental fish can be increased by adding coloring agents to artificial compound feeds. Fish in the non-veraison period are fed bait with balanced nutrition and reasonable addition of natural color-enhancing ingredients, and the fish body generally has a more obvious color-increasing and color-changing effect in about three weeks.