Little koi fish is a famous species of freshwater fish, which is sought after by lovers because of its beautiful and lively appearance. But raising little koi fish will also face the problem of poor water quality in fish tanks. At this time, it is necessary to add clean fish to help maintain the water quality of the fish tank. So what kind of clean fish should koi fish go with?

First of all, there should be no predatory relationship between clean fish and koi fish. Little koi fish is a small carnivorous fish at the top of the food chain, so we should pay attention to avoid mixing with other carnivorous fish, such as perch and salmon.

2. Clean fish that eat grass

Herbivorous clean fish is suitable for raising clean fish in koi fish. Herbivorous fish mainly feed on aquatic plants, algae and kelp. By consuming waste organic matter, sewage is purified, ammonia nitrogen in water is reduced, and the water quality of fish tank is better and cleaner.

There are many kinds of herbivorous cleaning fish, such as Pseudosaurus, Silver Shark and Monopterus albus. Among them, Pseudosaurus not only has a strong cleaning effect, but also can get along well with koi fish Jr., making it an ideal choice for koi fish Jr.' s polyculture.

3. bottom cleaning fish

Bottom-cleaning fish mainly live in the bottom of the aquarium and feed on the residue and waste of fish food, which is a cleaning technology for organic waste in water. There are many kinds of underwater cleaning fish, such as South American fish, short-horned whales and spotted sharks.

However, it should be noted that some bottom-cleaning fish are fierce and easy to hurt koi fish. Therefore, we should pay attention to their adaptability when choosing bottom-cleaning fish.

4. Which clean fish should koi fish avoid mixing with?

Koi fish should not mix with carnivorous fish, but also avoid mixing with the following clean fish:

(1) clean fish that pose a threat to Little koi fish, such as cobra fish and ghost swordfish;

(2) Cleaning fish that may attack Little koi fish, such as tiger sharks and silver carp;

(3) Clean fish who like to dig sand easily affect koi fish's swimming and foraging.