1, there are two kinds of small fish, one is immature fish, which generally eat plankton. The other is the fish that are not big in size after adulthood, such as guppies, zebrafish, lamprey, etc. These fish have a mixed diet and can eat insects and debris. If they are raised artificially, it is best to feed them fish food. This feed is nutritious and helpful for their growth. But change it every once in a while, so as not to feed a single feed for a long time and cause fish to be picky about food.
2, feeding the fish is generally during the day, unless the fish are kept in time for nocturnal. You can't feed it until after 9 o'clock in the morning, and it will be around 4 o'clock in the afternoon at the latest. If it's winter, the temperature will drop, so the feeding time should be adjusted sooner or later, after 10 in the morning and at 3 o'clock in the afternoon at the latest.