Some fish enthusiasts like to keep many different species of fish, but some species cannot be kept together. If they are kept together, they may fight and even kill some of the fish in the tank. Therefore, we need to figure out which species can be kept together when keeping fish together.
Predatory fish of the same species can sometimes be kept together with those of similar size, such as oscars, crown gars, and ten-banded cichlids. Safe fish of the same species can also be kept together, such as arowanas and Tanganyika six-banded cichlids. Large predatory fish and large safe fish can be kept together, such as arowanas and blood parrots (details). Juvenile large safe fish and predatory fish, such as adult blood parrots and flowerhorn fry.Mixing large and small fish, such as juvenile red snapper and blood parrotfish, is not advisable. Small fish tanks should also be suitable. Secondly, consider the compatibility of the fish food. Generally, the fish species kept together in the tank should be fed the same or similar food, and their eating methods should be similar. For example, fish like clown knife fish, corydoras, and plecos generally do not compete for food and should not be kept with fish that aggressively fight for food.
Furthermo
re, the water quality requirements for mixed-species fish should be similar, including water temperature, pH, age, hardness, and salinity. The fish should not differ too much in size, and it's important to select species that are easy to keep together and do not pose a threat to each other. Some large carnivorous fish, such as piranhas, are best kept alone or with fish of similar size and habits, such as oscars. Some more expensive and timid fish, such as discus, are best kept alone. Different fish require different levels of space, so pay attention to the combination of fish species at each level.
Finally, it's best not to keep too many different fish species together, otherwise the aquarium will look cluttered. It's ideal to have one main species and then add a few other fish that won't overshadow it. With proper feeding and care, there shouldn't be any major problems.
