Yes, zebra danios need an air pump. Zebra danios are very active fish, so they benefit from the extra oxygen and movement in the water that an air pump can provide. Because of these benefits, zebra danios should have an air pump in their tanks.
Aside from an air pump, here are some other things zebra danios need in a tank:
- A heater
- A thermometer
- A water filter
- Aquarium light
- Fine gravel or sand as substrate
- A lot of live or silk plants