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Old 03-13-2013, 03:23 PM   #1
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What do you think of moonlights?

From what I understand (correct me of I am wrong), moonlights are meant to simulate the moon at night which is good for spawning and also beneficial for coral growth. Moonlights are low power blue light that is not perceivable to fish.
When I used to have fish, during nighttime (with moonlights on) the fish would sleep. So perhaps the fish do not see the light.
However, I noticed that if my fixture is off at night (no light what so ever) my anemone closes up completely. With the moonlights the anemone stays open throughout the whole night, and closes up completely around 10am. [my actinic only turn on at 2 pm so that I can actually look at my tank when I get home]
The anemone reacts to light and if I turn on the lights when its closed up completely it will open up. If I put the tank in total darkness It will close up. So does the anemone perceive the moonlights if it stays open through the night?
In my personal opinion the moonlights( 8 moonlight LEDs) are quite bright.

What are your personal experiences with moonlights? Do you think they are beneficial or not? How do your tank inhabitants react to different light?
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Old 03-13-2013, 03:27 PM   #2
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I've heard that it is helpful. I run them on my tank, but haven't seen anything besides being happy about being able to see things after lights out.
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Old 03-13-2013, 03:50 PM   #3
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I'm up in the air with then. I have a DIY LED on one side of the tank but don't really use it. I like more of a "spotlight"look rather then the whole tank lit up.

I do feel however that my tank anyway would benefit from a total darkness period. There aggressive enough during the day.

I will also add that when my lights go out I hear ALOT of commotion for a little while coming from the tank but so much when I have moonlights on.

Hope this helps.
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Old 03-13-2013, 04:10 PM   #4
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I've done both, with and without moonlights, and saw no difference at all. I don't see how moonlights are supposed to help coral growth.
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Old 03-13-2013, 04:45 PM   #5
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I guess I will carry out an experiment and take pictures of how the anemone reacts to the different lights.
I will take pictures during several nights of moonlights on, and pictures during several nights of moonlights off. I will also take pictures of how the anemone reacts to the turning on of lights during its scheduled time.
I feel as though the anemone benefits more from a light period and a total darkness period - seems to follow the light cycle a whole lot better (doesn't open and close randomly)
Odd question comes to mind - do anemones sleep? Or at least have a rest period?
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Old 03-13-2013, 05:56 PM   #6
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I know my fish don't sleep when the moonlights are on. They do sleep when it is total darkness (flashlight peek). So they absolutely DO perceive the moonlights. My moonlights normally go off at 11:30pm except for the 1 time I did a test 'till 2am to see what the fish did. They stayed up the whole time.
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Old 03-14-2013, 12:29 AM   #7
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I've never had an issue with my fish not sleeping with my moonlights on.
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Old 03-14-2013, 01:14 AM   #8
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Some unwanted algae proliferate uncontrollably when exposed to certain frequency of the light spectrum. The blue which penetrates into deeper water however has a minimum effect on them while corals love it. This is the reason why you run blue longer than the white light in reef tank. As for the fish, it helps minimize the stress on them when your turn on or off the white light since it soften when the blue is still on. My fish love to play hide n seek when the moon is lit lol. It is beneficial for your live stock to have total darkness to simulate the real world with day and night.
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Old 03-14-2013, 08:32 PM   #9
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You run blue longer than white in a reef tank simply because people try to use that as a morning/evening transition. Nothing more. Photosynthetic creatures need a certain amount of light, for a certain amount of time, and that's it. Running blue lights longer is not helping anything. I've also used hydroponics fixtures over a reef tank instead of the aquarium ones (the difference is there is only 1 cord, and hydroponics fixtures have larger reflectors), and had an immediate on/off for the life of the tank. Fish and corals grew and lived just fine.
I notice on my tank now when the blues go on, fish freak just as when the daylights go on. It doesn't keep them calm at all. The only way you could get that to stop happening is if you used a self dimming LED fixture that did that for you, gradually. It's not necessary though.
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Old 03-14-2013, 09:59 PM   #10
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I run my blues at 1% all night and the fish all bed down once the lights dim down to 1% (the lights drop gradually over 4 hours). Do you think there is benefit to having a period of total lights off?
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