Originally Posted by xShainax
Is it ok if I leave one of the tanks on as a nightlight?
I turn the aquarium light off at night so that my fish can comfortably sleep. However, when I first got him, I wondered if it was too dark for him in my room at night, so I put my alarm clock (it has a dark blue lit face) by the tank. The dark blue light illuminates one side of the tank just enough so that sometimes I am able to see the shape of my fish swim or float around at night. It makes for a dimly-lit nightlight. I would suggest giving your fish some semi-natural darkness at least, so that they can sleep.