Your aquarium will need to be completely set up with
filtration and heater running for at least 24-48 hours
before adding any fish. The water may still be cloudy at
this point so you should wait until it has cleared. If the
water temperature has remained stable and the cloudiness has
cleared, you are now ready to begin the cycling process of
your new tank and can add a few hardy species (dependent on
the size of your aquarium).