How big an aquarium is suitable for keeping Japanese koi?

KeepingJapanesekoi, how big anaquariumis suitable?

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Japanese koi is an ornamental fish that modern people are very passionate about, a high-end ornamental fish popular around the world, and has the reputation of "living gem in the water". More and more fish keepers are planning to keep Japanese koi, but for friends keeping Japanese koi for the first time, they really don't know what size tank is suitable for keeping Japanese koi!

Japanese koi come in many different body colors, have extremely high ornamental and keeping value, and Japanese koi are a large ornamental fish. Many Japanese koi can reach a body length of more than 1 m, and some ordinary koi also have a body length of several tens of cm. Even very small carp will slowly grow larger later. As a keeper, you must prepare a tank of sufficient size to keep Japanese koi.

So, what size tank should be used to keep Japanese koi? This needs to be decided according to the actual keeping situation. The most basic principle is to ensure that Japanese koi can move freely in the tank. If you are only keeping some small koi, then the size of the tank should be determined according to the number kept. Generally, a tank of 1.2-1.5 m or more, with a depth of 0.8-1 m or more, can meet the needs of keeping small koi. However, if the koi you keep are all very large, then you need to pay attention when determining the tank size; ensuring the koi can move freely is the key.

Please do not ignore the harm to Japanese koi from chemical substances in the water. The main factors affecting chemical substances and toxic substances in the water are biological activity, water source, bottom sediment and climate changes. If the fish pond is not cleaned for a long time, so that organic matter such as leftover fish food accumulates excessively, during the decomposition process by microorganisms, on the one hand it consumes a large amount of dissolved oxygen in the pond water, and at the same time it also releases toxic gases such as hydrogen sulfide, marsh gas and carbon dioxide. After these gases accumulate to a certain amount, they affect water quality, not only being unfavorable to fish growth, but also favoring the reproduction of pathogenic microorganisms and harming the fish.

Some algae, such as Microcystis, when they reproduce excessively, consume oxygen at night and reduce dissolved oxygen in the water, and when these algae die they can decompose and produce toxins that cause fish disease. In some places, the soil of fish ponds contains relatively high levels of heavy metal salts such as lead and mercury. When fry and fingerlings live in this environment for a long time, they are prone to bent-body disease. In some places, the water source used is polluted, or factory wastewater is discharged directly into rivers, reservoirs and lakes, bringing varying degrees of pollution to the water body. Various toxic substances in this wastewater cause fish meat to taste off, fish to become sick or even die, and destroy the basis of fish food, directly threatening fishery production.

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