Jan 30, 2011 #1 S shadyfish Aquarium Advice Activist Joined Jan 17, 2011 Messages 173 I have a actinic bulb that I was using as a moonlight/nighttime light can my fish tell that the light is on or is it not in their viewable spectrum?
I have a actinic bulb that I was using as a moonlight/nighttime light can my fish tell that the light is on or is it not in their viewable spectrum?