What is good water? How to get good water for fish farming?

Many people say that the most important thing about raising ornamental fish is that good fish in water is good, no doubt, just like people need fresh air to live, fish are inseparable from water, and the health and good water of fish are not open. There are also many friends who ask what kind of fish is good or not easy to die. Do not hold such a mentality, you can raise all kinds of fish well in water, so why is the water of fish culture so different from ordinary water? Why is the water for fish farming so important?

The range of breeding objects of ornamental fish is very wide, and different fish adapt to different "types" of water, so the requirements of water environment are more complex. Most of the time, ornamental fish live in limited space, the water space is relatively special, the water body is small, and the exchange self-purification capacity is poor. After a period of culture, all kinds of chemical substances, organic substances, bacteria, algae and other water quality factors such as acidity, transparency, hardness and fertility are easy to change. Therefore, how to regulate the water quality of ornamental fish is also very important.

Water quality is invisible except for clarity, so the water body is affected by various factors. No matter sea water or fresh water, water quality is affected by both chemical and physical factors, physical factors include water temperature, light, etc., and chemical factors include dissolved gas oxygen, carbon dioxide and dissolved salts in water; and biological bacteria, phytoplankton and plants, which constitute the water ecosystem. Today we will choose a part to talk about the temperature of the water.

Factor 1 affecting water quality: water temperature

Water temperature is most closely related to fish, which will not only directly affect the eating, growth, and development of fish, but also directly or indirectly affect other environmental conditions in the fish tank. Almost all environmental factors in the fish tank are restricted by temperature. Different species of ornamental fish have their own suitable water temperature requirements. Like goldfish, koi, etc. can withstand the temperature of 0.5-38 ℃, the appropriate water temperature is 23-32 ℃, before Xiaobian sent an island goldfish by the surface of the ice frozen, dissolved after continuing to live, so no more than minus 5 degrees it will not freeze to death, but if the water temperature below 10 ℃, the fish food intake decline, slow growth, 15 ℃ ~ 20 ℃ above food intake and growth rate significantly increased. Therefore, many fish traders regulate the water temperature to limit the growth of fish, and you can also make reference to their own regional conditions to appropriately regulate the temperature of the water in the fish tank.

Most of the ornamental fish like to be warm, and when the suitable water temperature is 25-33 ℃, the fish eat vigorously and grow rapidly. Fish below 25 ℃ will breed melon disease, and when the water temperature is 15: 19 ℃, the tank will be anorexic. If you find that your fish tank does not respond to the bait, then your first reaction should check whether the water temperature is normal, and then look for other factors one by one. Therefore, before buying ornamental fish, you must find out what kind of temperature they need and provide appropriate water temperature in the breeding process.

Effect of water temperature on fish tank and fish pond:

In the aquarium and pond water, the oxygen content decreases gradually with the increase of temperature, especially in summer and autumn high temperature season. This is because with the increase of temperature, the saturation of dissolved oxygen in water decreases, the metabolism of fish, bacteria and plants increases, and more oxygen is consumed, which is easy to cause oxygen shortage. Therefore, it is easy to have "floating head" or "stuffy tank" events. In addition, temperature can also affect the ratio of free ammonia to ammonium salt, in the case of higher temperature and pH, it can produce more free ammonia, and free ammonia is the most toxic form of ammonia nitrogen. In the high temperature period in midsummer, when the content of organic matter in the water is high, ornamental fish are prone to ammonia nitrogen poisoning.

The change of water temperature not only has a great impact on the aquatic ornamental fish itself, but also has an impact on the maintenance of the water quality of the aquarium, for example, the change of temperature can kill the bacteria on the filter, resulting in an increase in the accumulation of pollutants and a decrease in biological purification capacity. Therefore, maintaining the constant temperature in the aquarium is the most important daily management work.

Heating rods can be used in the process of raising ornamental fish in winter, and when changing water, make sure that the temperature of the newly added water is not too different from that of the water in the aquarium, and the difference is 1-3 ℃. If the difference in water temperature is too big, the fish are easy to catch cold, and the bottom of the sinking tank does not eat, etc. It is recommended that we do not put the aquarium near the doorway where the sun can directly shine, and it is most important to keep the water temperature constant.

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