leave all powerheads on 24/7?

[Skimmerking]

Originally Posted by Ryan

I agree with corpusse. Your fish usually sleep right in the rockwork anyway I wouldnt worry too much about.

Just for the Record Fish don't sleep.

[fkshiu]

My Tunzes go into a slower night mode. Not sure if it helps any, but it doesn't hurt anything either.

It may be helpful in that I just dump a slurry of Reefroids etc in after lights out and the polyps seem to have an easier time feeding with the lower flow.

[kien]

I put my two Tunze into sleep mode as well (50% of normal output). I have a couple of fish that hover to sleep and they seem to appreciate it (not as restless at night). I also have tiny shrimp (sexy and glass) that come out at night. No problems with anyone in this mode of operation so far.

[freezetyle]

the only problem i would see if you have them set up on a timer smaller fish may crawl into where the propeller is and when its time for start up get mangled. i would leave them on. unless you have the tunze or vortech which like previously stated just slows down at night

[mike31154]

Since installing a second VorTech in my system I've started using the 'slower' night mode. Been quite a while now and no apparent problems with lack of O2 at night. I wouldn't do it with just one though, don't think it would have been sufficient.

[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.

[manaf]

yea my valentini puffer goes on a rock and sticks to it and sleeps its quite cool to watch