Surely many of us think or have that picture of the fish in a round fish tank, and we have never come to consider if it is their true habitat or they are happy circling in a small circle. We have the belief that a fish with food and water is happy, but this is not always the case.
They are mostly cold water fish such as golden carpThose of us who think that by putting them in a fish tank we have all the care done. They are usually the ones indicated for gifts or the most striking for children. But it is a false belief because unfortunately few are the copies that survive in these conditions long term.
We have to bear in mind that as soon as we acquire, in this case, a fish in our hands, we are committed to provide you with a decent life with the care and attention that is required even if it is a fish. And keeping them in a tiny fish tank is not a decent life, the most advisable thing is always in a aquarium or pond.
In fish tanks the space is so limited that the fish will not be able to swim therefore we will turn him into an unhappy fish. Nor will it grow in the estimated proportions because we encourage 'dwarfism', as we do not have enough space, the internal organs do not develop and cause it health problems. And obviously the water without the filter cannot be completely clean because there will always be food remains and their excrement.
In an aquarium, it can be one of the proportions indicated for the fish that we introduce, it comes fully equipped or at least prepared for an artificial light filtering system and heater. In an aquarium, what is sought is to create a natural ecosystem, plants, gravel, rocks ... in such a way that the fish live in conditions similar to those they would have in their habitat of origin.