This depends on your actual situation. There are many kinds of ornamental fish, and different kinds need different aquarium sizes. At the same time, your economic strength and the placement of furniture in your home all affect your choice of aquarium size, as shown in the following analysis:

First of all, according to the different kinds of ornamental fish, choose the right fish tank.

1, if you raise ordinary ornamental fish, such as small goldfish and small tropical fish, then the best specification should be small, and the specification range of 350*300*280 is better;

2. If you want to raise medium-sized fish, such as arhat fish and clown fish, then the best size should be on the upper side of the medium size, and the size range of 400 * 320 * 295-600 * 350 * 400 is better;

3. If you want to raise arowana, koi fish, rays and other large fish. Then this size should be more than one meter, otherwise there is not enough room for fish, and a large fish tank is needed to meet the demand.

Second, according to the actual economic situation, choose a fish tank that suits your economic affordability.

1, the cheapest is that it doesn't need an ecosystem, and small fish tanks generally range from ten yuan to twenty or thirty yuan;

2, the economic strength is average, in order to raise fish, you can pay money, and then buy an ecosystem, the size is average, which can meet the needs of ordinary ornamental fish, and the price is around 50-700 yuan;

3. With strong economic strength, first, you can design and build your own fish tank, and second, you can buy a large-scale ecological fish tank with a price of more than 1000 yuan.

Third, choose fish tanks of different sizes according to your room.

1, if it is a small family, then it is recommended to choose a small fish tank;

2. If the space is large, you can choose a large ecological fish tank;

If you build your own house, you can design your own fish tank.

How to choose the size of the fish tank needs to be comprehensively considered in combination with the above three factors, but also depends on its own actual situation. However, it is worth noting that if novices suggest buying small and medium-sized fish tanks, at the same time, it is best to buy an ecosystem with good water quality to raise fish. It is not easy to raise ornamental fish well, which requires economy and energy.