With the increasing number of domestic fish enthusiasts, ordinary ornamental fish has been unable to meet the needs of the majority of players, many kinds of foreign tropical fish have been introduced into our country, greatly enriched the variety of ornamental fish breeding. However, due to the origin of tropical fish, species, habits of different reasons, tropical fish rearing is more difficult. I after years of personal feeding, access to some of the domestic and foreign works of tropical fish rearing technology, absorbing the circle of friends of the fish experience, summed up part of the tropical fish rearing technology, effective experience, in this exchange with you to explore.

1 ? How to regulate water quality

1.1 What water to use. Fish with the water because of the fish species raised by different and have their own differences, river water, lake water, reservoir water is relatively rich in dissolved oxygen, but the water contains a variety of harmful insects, disease-causing bacteria are more numerous, to be processed before you can use; wells, springs containing minerals, and more hard water, in addition to some of the Great Lakes of Africa, in addition to some fish, other types of tropical fish are difficult to adapt to; and our daily use of tap water, characterized by easy access, containing bacteria and water. Characterized by easy access, containing very few bacteria. China's tap water hardness throughout the country are in 5 ~ 15 German degrees, feeding some of the tropical fish need soft water before the need for water softening, common water softening methods are the following (1) ion exchange softening method. Use special softening materials to filter to achieve the purpose of softening. (2) sun water method. The water will be left to stand for a longer period of time (15 days to 30 days). (3) Heating method. Heat the water and then filter and precipitate, and then aeration. (4) Add a small amount of soda ash (Na2CO3) to the water, filter out the precipitate and then add a small amount of acid neutralization.

Poor water quality

Good water quality

1.2 How to monitor water quality. Regularly monitor the water quality, usually monitor the water quality of the physical and chemical indicators are dissolved oxygen, acidity and alkalinity, three state nitrogen content, water temperature, light intensity, etc.. Dissolved oxygen in 5mg / L is more appropriate, pH in 5.5 ~ 8.5, nitrite nitrogen content is less than 0.1mg / l, the water temperature is generally maintained at about 25 degrees Celsius for the best.

1.3 How to maintain water quality. Add water stabilizer and nitrifying bacteria regularly. Water stabilizer can neutralize some harmful ions in the water; nitrifying bacteria can go out the residual harmful ammonia nitrogen in the water, and can maintain the amount of beneficial bacteria, inhibit the reproduction of harmful bacteria; a small amount of salt can have an inhibitory effect on the reproduction of bacteria in the water.

1.4 When to change water. After feeding for a period of time, the water dissolved a large number of harmful substances, the water color is yellow and dark, it is time to change the water. Generally, the amount of water changed is one-third of the total amount of water changed every week, depending on the density of the fish, the situation of baiting, the season, and the purpose of feeding to increase or decrease as appropriate. In the following cases, it is necessary to increase the amount of water change: (1) The temperature is too high and the air pressure is too low. (2) Nitrogen exceeds the standard. (3) More baiting, more feces and secretions make the water quality deteriorate faster. In addition, the amount of water change should be reduced in the following cases: (1) The temperature is too low, water change will lead to a large temperature difference. (2) Species with special needs. Some species of fish, such as dragonfish, fairy fish, frequent water changes are detrimental to their growth. (3) Change water less when the fish is in special physiological state, such as when the fish is physically weak, in the breeding stage, or when it has just hatched out its young. When changing water to the aquarium, we should pay attention to try to keep the water temperature and the original just come to the water temperature has been, winter and spring temperature is low, the new water temperature can be higher than the original water temperature of one to two degrees; summer is the opposite, the new water temperature can be lower than the original water temperature of one to two degrees.

Divine Fish Eggs

Divine Fish Spawning Stage Less Water Changes

2 Fish Feed

The relationship between the water quality changes, the amount of feed, and the condition of the fish are always interacting with each other. Feed quantity increase, fish intake will also increase, activity, ornamental, resistance to disease will also be increased accordingly, but the water quality will also speed up the rate of deterioration, and the water quality changes in turn affect the above factors, not conducive to the growth and reproduction of fish, and vice versa. So the key is to grasp the appropriate amount of feeding. Generally speaking, it is appropriate for the fish to finish eating in about five minutes. Adult fish without special needs can be fed once a day or even once every two days, and it is better to feed less than more within a certain range. In the following cases, it is necessary to increase the feeding amount: (1) after the water change, the water quality is better, the fish's appetite increases, and the feeding amount can be increased. (2) Recovery stage after illness. (3) Supplementary nutrition before giving birth, which is conducive to increasing the quality of the litter. (4) Post-spawning recovery stage, supplemental energy, which is conducive to the recovery of the next fish for the next reproduction. (5) Seasonal temperature is suitable, can appropriately increase the feeding amount. In the following cases, it is necessary to reduce the feeding amount: (1) Do not feed before water change to prevent the fish from vomiting after water change. (2) Not feeding or less feeding during breeding, when the fish's appetite decreases or there is no appetite. (3) Less feeding for sick fish. (5) Do not feed in low temperature to slow down the time when the water quality becomes bad.

3 Disease prevention

Tropical fish diseases are varied and difficult to cure, so disease prevention should be a priority.

3.1 Clean out the tank in the following situations: (1) when you want to replace more than half of the fish stock or change the main feeding species; (2) when there are fish deaths one after another, and the measures taken do not have any obvious effect; and (3) when there are too many algae and aquatic organisms growing.

3.2 In the following cases, the fish should be isolated: (1) when the fish are sick; (2) when the fish eggs and juveniles need to be removed for temporary rearing; (3) when the newly purchased fish must be isolated and reared to make sure that they are free from diseases before being put into the mix.

3.3 Biological bait (e.g. red worms) must be fresh and rinsed clean, and sterilized with potassium permanganate if necessary.

3.4 The water temperature should be stable, not too high or too low; the light intensity should be appropriate, too strong or too weak is harmful to the growth of fish.

3.5 Maintain the water quality, control the density of fish, prevent excessive density.

Normal feeding density

Slightly higher feeding density