The loach is a common ornamental fish, and they mainly eat small plankton, including zooplankton, phytoplankton and tiny algae. When feeding loaches, you should choose the right size of fish food, water-cooked worm eggs, small live bait, etc. These foods can provide the loaches with the nutrients they need and also ensure their healthy growth.

When feeding loach, you should pay attention to the following points:

1. Feed in moderation. Loach has a small stomach and intestines, which can easily cause indigestion, so it should be fed in moderation and not too much at a time.

2. Regular feeding. Regular feeding can develop good eating habit of loach and avoid overfeeding.

3. Choose the right fish food. Fish food with small particles is suitable for loaches, which is easy to be digested and absorbed by them.

4. Water quality management. Loach are suitable to live in clean water, suitable water temperature and moderate pH value environment, therefore, attention should be paid to water quality management when feeding loach to avoid water pollution.

Overall, the key to feeding loach is to choose the right food, control the amount and frequency of feeding, and pay attention to keep the water clean, so as to ensure the healthy growth of loach.