leave all powerheads on 24/7?

[shrimpchips]

Originally Posted by asmodeus

Just for the Record Fish don't sleep.

Yes they do

Many wrasses for example secrete a mucus sac in which they sleep - helps avoid predation while they're out for the night. I've seen my sixline do it myself - wedged in the rock, unresponsive to stimuli such as a moving feeding stick and a shining beam of light.