leave all powerheads on 24/7?

[manaf]

thx alot for the advice im going to try that i think my fish kinda want a rest for a bit cause i got a cowfish and its not the best swimmer and having 81.25 turnover rate he can get cranky with that

[corpusse]

The ocean doesn't get calmer at night.

The only time I turn my powerheads off is during target feeding. Fish will find calm places to sleep.

[Ryan]

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

[shrimpchips]

It's also important to keep the dissolved oxygen levels up, especially at night when everything in your DT is respiring so the O2 levels drop much more - turning down the current can reduce the O2 in your tank and cause problems - same thing with turning off your skimmer at night. I wouldn't do it.

[manaf]

alright ill leave it all on just thought it was a concern for my cowfish but he just sleeps in the corner so i think its fine


thx guys!

[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

[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.