Rats and fish can be raised without bottom sand. The bottom sand can provide hiding and entertainment places for rats and fish. With the bottom sand, breeders can also watch the scene of rats and fish fiddling with the bottom sand. If there is no bottom sand, it will reduce the fun of watching, but it has no effect on the growth of rats and fish.

Ratfish belong to the lower fish. In order to make them grow more, aquatic plants can be planted in the water, which can not only provide daily food for ratfish, but also provide them with hiding places. You can also put a good filtration system in fish tanks, because they like to live in a water environment with high dissolved oxygen.

1. Water quantity: Rats and fish belong to the lower fish, and they like to move in the lower water, so the water quantity in the fish tank should not be too small, at least 20 ~ 30 cm deep. This depth can provide sufficient space for rats and fish to move.

2. Environment: At the same time, you should have a holiday mountain or sunken wood in the fish tank to provide them with a place to hide and rest.

3. Food: Ratfish are omnivorous fish, and they often eat food residues in fish tanks. They also like to eat plants, such as aquatic plants. Therefore, you can plant a proper amount of aquatic plants in the fish tank to provide them with daily vitamins. If conditions permit, you can also put bottom sand in the fish tank, and it is best to put special rat sand for rat fish.