Small tropical ornamental fish are generally divided into three categories: carnivorous, omnivorous and phytophagous. Among them, carnivorous fish mainly prey on other small organisms, such as water fleas, rotifers, small crustaceans and so on. If there are a lot of carnivorous fish in the aquarium, they will attack each other and fight fiercely. Omnivorous fish can eat both animal food and plant food. When feeding, the proportion of food should be controlled according to the characteristics of different kinds of fish. Phytophagous fish are mainly plant foods such as vegetables and aquatic plants, which need to provide a diet with high fiber and multivitamins.

2. Feed selection of carnivorous fish

The basic food of carnivorous fish is meat, and you can choose bait, shrimp, earthworm and so on. In addition, you can choose some side dishes specially designed for carnivorous fish. Carnivorous fish like to eat some big food, and the owner can increase the size of the food appropriately.

In order to ensure the nutritional balance of carnivorous fish, you can also add some meat and bone meal with high quality and low price and rich nutrition, and at the same time, you can also add nutritional elements such as honey and vitamins, which can enhance the immunity of fish and promote growth.

3. Feed selection of omnivorous fish

Omnivorous fish have many kinds of food, so the owner can provide a variety of food choices. Fish, shrimp, sliced meat, vegetable leaves and other foods that can arouse fish's interest can be used as bait. Dried fish feed containing vitamin B and supplements as nutritional additives is also a good choice.

In addition, the available omnivorous fish foods include conifers, small mollusks, plankton and small crustaceans. Among them, plankton is one of the favorites of many omnivorous fish. But keep the water clean.

4. Feed selection of herbivorous fish.

The main food of phytophagous fish is plants, such as spinach, carrots, lettuce, tofu and so on. Rich in plant protein and vitamins, it can ensure the healthy growth of phytophagous fish. If only plant food is provided, plants should be diversified to ensure balanced nutrition. Aquatic plants are an important food source for herbivorous fish, and owners can raise aquatic plants for fish to eat. In addition, there are special plant-based catering in the market, which is a good choice for plant-based fish.