How to keep them indoors and what to look out for

Some people keep goldfish indoors and some keep them outdoors, but this time we will explain how to keep them indoors and what to keep in mind.However, the location of the animal and changes in water temperature are easier to control than outdoors, but the skill of the person who manages the animal is also required.
For example, if a goldfish is killed by white spot disease outdoors, it may be because the water temperature was unstable during the change of season, but if it is kept indoors, the water temperature can be adjusted to some extent by the house owner, and the probability of noticing the disease is higher than for outdoor keepers. Therefore, if the animals are kept indoors, there is a higher probability that the disease will be noticed and cured as soon as possible.
We hope you will read the description and learn about the recommended places for goldfish, since people who keep their goldfish indoors tend to spend more time with them than those who keep them outdoors.

The first thing to consider when placing an aquarium indoors is sunlight.
Naturally, it is better for goldfish to be exposed to sunlight, but if they are exposed to direct sunlight for a long time, the water temperature in the aquarium will rise rapidly. In such cases, we recommend that you cover the tank with lace curtains to prevent the water temperature from rising too quickly.
However, as far as summer is concerned, it is not recommended to expose them to too much direct sunlight. Direct sunlight in summer will quickly raise the water temperature after just one hour of exposure, so it is better to have them kept in a well-ventilated place without much direct sunlight during the summer.
It is even better if you also pay attention to the direction of the sun. If you keep your goldfish in a place where the sun shines in the west, the water temperature will rise when the sun shines, but when the sun goes down, the water temperature will drop.

As I explained a little above,Places where changes in water temperature occur in a short time are very harsh environments for creatures such as goldfish. Therefore, it is necessary to avoid such places as much as possible. The western sun, as explained above, is one such place.
Another blind spot for those who keep them is where to turn on the heating and cooling. In a typical building, this would be the living room or bedroom. It is not that there is anything wrong with air conditioning, but for example, if you turn on the air conditioner in summer because it is hot, it will lower the room temperature in a short time and make it cooler. This is very nice for humans, but for ornamental fish such as goldfish, they have to work very hard to cope with the sudden drop in water temperature.The environment in which the water temperature changes in a short period of time, as explained above, is completed when air conditioning is turned on. For humans, this may be a blessing, but for goldfish and other fish, it is not a blessing at all. In fact, it could lead to a life-threatening situation. It is recommended to keep goldfish in a place where air conditioning is not available (such as an entrance or hallway) so that they are less exposed to changes in water temperature, even for a short time.
If you must keep the aquarium in your living room, etc., please create an environment that does not allow the water temperature to change rapidly by directing the air conditioner airflow not toward the aquarium but to an area other than the aquarium. If you are concerned about water temperature changes, we recommend installing a heater. By adding a heater, even if the water temperature changes in a short period of time, it will maintain a constant water temperature, so if you are concerned about this, please try adding a heater.

Some people have the image that those who keep goldfish indoors are easier to keep because they are less harmed by the environment than those who keep them outdoors, but they often kill or make them sick without knowing that the place where they are placed or kept is a harsh environment for them.
Short-term changes in water temperature are not common in nature, but if they are, they can be moved to another location, such as a river. This is not the case in the case of human aquariums. They live in a fixed space such as an aquarium, so they cannot escape from that place even if it is a harsh environment. Therefore, if humans set up the aquarium in a place where the water temperature does not change much and where there is good ventilation, the goldfish will be able to live more comfortably and healthily.
Some people say that it is impossible to go that far, but it is easy enough to think about. If there is only one place where the sun doesn't shine for a long time, there must be at least one place in your home.