Do killifish need an air pump?

No, killifish do not need an air pump. Killifish are a hardy species that do not require air pumps. They do, however, need a tight lid over their tanks (they are jumpers), a heater, floating plants, plenty of swimming space, a water filter, and a well-balanced diet.

Also make sure not to overcrowd your tank and keep a water temperature of between 72 and 75 degrees Fahrenheit (22 and 23 degrees Celsius), a water PH level of between 6 and 7, and a water hardness of between 122-162 parts per million.