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Old 06-01-2009, 09:36 PM   #1
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Light time limit

i've noticed that when i turn off my light that all my corals shrink quite a bit and grow back to normal size after having light on for a couple of hours, is it bad if i leave my light no all 24 hours or is its normal for corals to shrink?

i have a pc with 1 blue light and 1 white light and then have a 2ft bar of consisting of 30 led's as a moon light
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Old 06-01-2009, 09:48 PM   #2
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Not so wierd.....Corals are animals and as such need a rest period of at least 8hrs. It is normal for them to shrink up after the lights are turned off.
More important then the type of lights you have are the Wattage of the lamps.
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Old 06-01-2009, 10:04 PM   #3
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they are both 65 watts...
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Old 06-01-2009, 10:14 PM   #4
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Corals will always close up a bit when the lights go out.... just like thincat said, they need a lights out period for at least 8 hours but if you run those light for more than 10 hours you risk an ugly algae outbreak. Run for ten hours or so then turn them off in my opinion.
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Old 06-01-2009, 10:15 PM   #5
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typically have them on for 10 hours so i guess im good then...thanks for the quick replies
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Old 06-01-2009, 10:42 PM   #6
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Think of it as nature.....there is not sunlight 24 hours a day. 8-10 maybe even 12 hours a day is good.
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Old 06-01-2009, 10:52 PM   #7
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Your lights should be good for most low light corals, LPS types.
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Old 06-01-2009, 11:13 PM   #8
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i have a couple mushrooms, torch coral, anemone, and a couple corals i think are referred to as candy canes or sun corals...

is my light sufficient for these, if not what wattage do you recommend?
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Old 06-02-2009, 10:48 AM   #9
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Okay, long has your tank being set up? You don't have enough lights for the anemone! It needs at least 200 watts of either T-5 or MH lights. You are looking for intensity and penetration which the PC lights lack. If the coral you are talking about is a sun coral it does not need much if any lights, but you have to feed each polyp.
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Old 06-02-2009, 11:04 AM   #10
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wouldn't 200 watts be a little intense, i only have a 55 gallon tank?

the lights i have now seem to bring lots of life to my corals as they have grown much larger in a matter of 1-2 days...
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