Originally Posted by Fresh2o
I don't own this model but is there a possibility that the actinic bulbs have a separate ballast (which may need to be replaced)?
Sent from my iPhone using Aquarium Advice
Or also for quick test try the white bulbs in the blue socket.(vice/versa)
It will tell you if it is the bulb or ballast.
I have many coralife and the fan is on a separate power feed then light so one has nothing to do with other.
I know I replaced several ballast at the 3-4 year mark on coralifes.