FishCommon sense----water

Water is the growth of fish The most basic condition, the quality of water quality is directly related to the growth and reproduction of tropical fish. Many tropical fish enthusiasts have many problems in the process of raising fish due to lack of knowledge in this area, which affects the raising of tropical fish. Therefore, before raising fish, you must have a relatively detailed understanding of the water. 1.Water quality All water in nature contains more or less various chemical substances, which directly affect the fish grow. Because tropical fish are small fish that live in tropical waters, their water requirements are much higher than other fish. Tap water, river water, well water, lake water, etc. can be used to raise goldfish directly. If Matata is used to raise tropical fish directly, it will make the tropical fish sick and even die. Therefore, if we want to raise tropical fish well, we must meet the water quality requirements of tropical fish. The so-called water quality mainly refers to the hardness and pH of water. The hardness of water is determined by the content of calcium, magnesium and iron salts in the water. When the content of these calcium salts in the water reaches 65 mg per liter, it is called neutral water; When it is in milligrams, it is called soft water; rainwater is soft water; tap water and river water are mostly neutral water. The easiest way to judge the hardness of water is to see if there is water or alkali at the bottom of the kettle. If the water is alkali, it is hard water, otherwise it is soft water. Water can be softened when boiled. The acidity and alkalinity of water, or PH value, is determined according to the amount of hydrogen ions in the water. The pH range is between 0-14. The method of measuring PH value is to use litmus paper and color guide, put the test paper into the water for half a second, take it out, and compare it with the color guide to get the PH value. When the pH value is less than 7, it is acidic water; when it is equal to 7, it is neutral water; when it is greater than 7, it is alkaline water. Most tropical fish are suitable for living in the pH range of 6-8. Test strips and color guides are available in medical stores everywhere. Most people in the city use tap water to raise tropical fish, and the tap water is basically neutral water, and its hardness and pH are in line with the requirements of raising tropical fish, so there is no need to worry too much in this regard. However, tap water also has its shortcomings. Tap water is disinfected with chlorine gas and bleaching powder, so tap water always contains trace chlorine gas and alkali, and chlorine gas is a substance that is more harmful to tropical fish. When feeding tropical fish with tap water, it is necessary to remove the chlorine in it. The main methods are drying method and chemical method. The drying method is to dry in the hot sun for two days, or dry it in a lack of light for 4-6 days before use. The chemical method is to use sodium thiosulfate to remove chlorine, and the ratio is to add 1 g of sodium thiosulfate per 10 catties of water, stir and dissolve, and then it can be used. 2.Change the water During the growth process of tropical fish, they need to excrete feces constantly, and the bait remaining in the water is also constantly oxidized and rotted, all of which will produce Harmful substances make the water quality worse, affect the normal breathing of tropical fish, make fish sick and even die. Therefore, it is necessary to raise the water for tropical fish frequently and timely to keep the water quality fresh and enable the tropical fish to grow normally. The water change is divided into partial water change and full water change. Partial water change is also called watering, which is to use a siphon to suck out the fish excrement, residual bait and other dirt at the bottom of the fish tank. It is not necessary to remove the fish and aquatic plants for some water changes. The water absorption should be about a quarter of the water in the tank. For large fish tanks, a certain proportion can be reduced. In short, it depends on the specific situation. After the dirty water is sucked out, add new water that has been dried or chemically dechlorinated at the same time and at the same temperature. If the water temperature is low, you can add boiling water or use a heater to heat the water to the water temperature in the tank, and then add the new water into the tank. . The frequency of adding water is preferably twice a week in autumn and winter; three times a week in spring and summer. All water changes should be done when there is a lot of dirt in the tank, and the aquatic plants and bottom sand need to be re-cleaned. All water changes should take out all the equipment in the fish tank; take out the aquatic plants; take out all the fish Take it out and temporarily put it in another container with the same temperature as the original water; scrub the tank wall and bottom with a sponge or sand cloth, and then suck out all the water. If necessary, wash it again with a small amount of concentrated salt water, then rinse it, and then re-install the tank. After adding new water, wait two to three days before putting the fish back into the tank. Even if it is chemically treated water, it is best not to put the fish in immediately, so as to avoid the new water irritating the fish too much and causing accidents. The frequency of all water changes should be once every three to four months, but if the water quality changes, the water should be changed at any time.