They all eat the same food. They all like to eat live food (small fish), but granular food is also ok.

Then the sick fish you bought came back,

Also, when you buy fish back, you don't go directly into the fish tank. Generally, you don't go directly into the fish tank. The water in the fish shop is not very clean. When the fish comes back, don't open the bag and put it directly in the fish tank for about half an hour. Take the fish out of the belt and put it in the bathtub. Don't dump the water.

Feed the fish once or twice a day on time, for example, from 8: 00 am to 10 am and from 2: 00 pm to 4: 00 pm, the fish usually have a good appetite or appetite during this time.

But I suggest feeding it only once a day, not too much, and it is best to eat it in half an hour.

Generally, don't feed the fish in the first two days after they come back. Pay attention to the change of water quality. These kinds of fish you raise are fierce and will attack other fish. Why do they all like to occupy the site and don't like to enter their site without the same kind?

There's only so much I can do to help you. I hope you can have fun while raising aquarium fish (* _ _ *) hee hee ...