Better to NOT run moonlights?

limitup

Premium Member
We had a power outage tonight for about 6 hours and something cool happened. I kept a koralia and bubbler going so no problems there, but the room the tank is in was pitch black due to no lights at all.

A few hours later I came back to check on the tank with a flashlight and I saw coral polyp extension like I've never seen before!

Now normally I am running the 9W of LED moonlights that are built into my Finnex canopy. I always thought it was a little bright for moonlights and have meaning to disconnect a few of the LEDs, but now I'm thinking of just turning off the moonlights altogether.

Do most corals prefer pitch black at night? I swear the polyp extension was insane, unlike anything I've ever seen in my tank before. Does this mean my moonlights are too bright, or something else??

The only other different was less flow in the tank since I only had a Koralia moving water around ....

The coolest thing of all though is that when the power finally came back on at about midnight, and the lights came blasting on, all the fish were stunned and I was able to net the pesky damsel I've been trying to get out for weeks. I've tried the "light shock" method before but it never seemed to work. Maybe with the bright moonlights it just wasn't enough of a shock to make him oblivious to my net like it did tonight. Woohoo!
 
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Corals do need a certin amount of light, but also come out at night to feed. This is when you will see some awesome things
 
Sure. I've always enjoyed looking at my different tanks at night, for years. With this new one I'm thinking my moonlights are just too bright, and while that was the first thing I thought when I first got the tank, I never thought twice about how it might affect the inhabitants perception of "night".

In my 140g I think I have just 2 1W LEDs for moonlights. In this 30g Finnex the canopy has 9 1W LEDs which is pretty darn bright. It's great for viewing, but maybe too much and the corals never really know it's "night".

Is there a general consensus as to how much light is too much for moonlights? Or better to just leave them off entirely??
 
I have a night vision scope & video camera. From time to time I turn it on at night just to see what goes on. I really like to do it after I add a new coral. Its awesome
 
Moon lights are good.

I have all my lights come on & go off just like a sun rise and a sun set.

the moon lights stay on all of the time.
 
I have 2 lunar links over my 120. They are far too dim for me to think it's affecting my corals in any noticeable way, but they are bright enough that I do not walk into the tank at night. I have to use a flashlight if I want to actually see anything though.
 
I just put the moonlights on a timer and I'm going to leave the tank completely dark for 5 hours a night and see what happens.

I swear I've never seen such polyp extension when the moonlights are on. For example, my candy cane looks perfectly healthy but I've never really seen it's polyps much at all. Tonight after the tank was completely dark for a few hours the polyp extension was insane.

Eventually when I'm bored I will probably take the fixture apart and disconnect all but 2 or 3 of the moonlights. I think the 9 it has is just too much. I've done a lot of night diving and with the 9 LED moonlights it's about as bright as it would be in only 5-10 feet of water with a full moon.
 
Corals eat light and filter feed. If there is no light, they will focus on filter feeding. This is probably what you are witnessing and probably doesn't mean much, except to say that when there is light, they don't feel as much need to filter feed.

I run my blue actinics 24/7 tho, so I'm probably biased.
 
<a href=showthread.php?s=&postid=15173436#post15173436 target=_blank>Originally posted</a> by Flipper62
I have a night vision scope & video camera.
Hmmm..... found a new use for that did ya? :lol2:
 
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