Big fish will eat small fish. But not all big fish will eat small fish, fish feeding habits are divided into four categories, respectively, carnivorous, herbivorous, omnivorous and filter feeding. Carnivorous and omnivorous big fish have the habit of eating small fish, herbivorous fish often do not eat, filter feeding fish only when the body shape is very different, will take small fish as their food, such as whale shark as filter feeding fish, will eat small fish.
1. Close to the shape: In mixed culture of fish, the first thing to pay attention to is the shape. As mentioned above, big fish will eat small fish, so only when fish with similar shapes are raised together can this situation be avoided. It should be noted that some fish themselves are ferocious and aggressive, so even if they are raised with similar size fish, they will always fight, so it is best to raise them alone.
2. Habits are the same: Polyculture fish must ensure that their habits are the same. For example, cold-water fish cannot be polycultured with tropical fish. Cold-water fish cannot tolerate water temperature above 20 ℃, while tropical fish need to survive in an environment of 20-30 ℃. In addition, pH, hardness and other elements should also pay attention to consistency.
3. Adequate space: When different fish are mixed, some of them are inevitably territorial, so we must provide sufficient space, so that they will not always encounter fights, thus preventing a lot of unnecessary trouble.
