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Old 09-17-2010, 06:26 PM   #1
Ace
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Do i need an actinic light?


My 50/50 compact bulb blew out a week ago, and so i just replaced it with a regular fluorescent bulb, and now about a little less than half of my button polyps are closing up and some even look dried out or something. so is the wrong lighting causing this, because doesn't actinic light play a part in a coral's photsynthesis? or is it normal for button polyps just to close for a long time like that? i have 40 watts of normal fluorescent for my 10 gallon right now, since my 50/50 blew out, and how soon do i need it?
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Old 09-17-2010, 08:43 PM   #2
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The short answer is no, corals don't need actinic light. Your coral probably need some time to get used to it without it. Actinic supplement is benefical and helpful, but it is not a necessity
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Old 09-18-2010, 09:23 AM   #3
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oh, ok, thanks. but is it normal for button polyps to just close up or look dried up for a few days, because a few of mine do that.
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Old 09-18-2010, 09:35 AM   #4
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Quote:
Originally Posted by Ace View Post
so i just replaced it with a regular fluorescent bulb ...... i have 40 watts of normal fluorescent for my 10 gallon right now, since my 50/50 blew out, and how soon do i need it?
Define "regular fluorescent". Is this code for a 10k bulb, or are you using like standard fluorescent hood lights that you would see on a freshwater aquarium? It's not the color, but the intensity that's important. 40 watts sounds low but you seem to indicate it's a nano reef, so if that's the case it might be fine.

Honestly, I know people who prefer to run without actinics. The only true benefits to actinics are to us. Absolutely not necessary for aquatic life, only looks cool. A 10K light gives much more usable light for your corals. The only exception I can think of is if you have *too much* light. With a PC fixture, I doubt that's the case. As berger said, it may also just be getting adjusted to the changes.
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Old 09-18-2010, 11:32 AM   #5
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you may be seeing simply and adjustment to an increase in PAR. A 10l bulb will put out more light that the coral can "see" and use than a 50/50. So just like when you add a light or replace and old bulb (which you also technically did) you will get a reaction (you corals' version of squinting when someone brightens a light). Since it is a relatively small change they should adjust in a few days.
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Old 09-18-2010, 01:49 PM   #6
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they're 20 watts bulbs, and not too sure on the exact kind they are or the spectrum, since those bulbs are really basic. but almost all of them are open now, except for about 5-10, so i guess they were just adjusting, like you guys said. thanks
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Old 09-18-2010, 01:59 PM   #7
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It usually will say right at the base of the bulb if you'd like to check to make sure. Also if you still have the packaging I'm sure it would say there.
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Old 09-18-2010, 02:04 PM   #8
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My guess if it's "rtegular bulb" means regular bulb for a house not fish tank,so I'd get something thats for a fish tank(saltwater) like 10K.
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Old 09-18-2010, 02:08 PM   #9
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no, I'm pretty sure they're aquarium lights, but i need to get some real lights. does 10,000K daylight bulb and 10,000K 50/50 bulb sound good? It'll be 40 watts together i think, I'll have to check the ones at my lfs.
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Old 09-18-2010, 02:23 PM   #10
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What you have is probably perfectly fine, we're just trying to help you make sure it's fine.
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Old 09-18-2010, 07:07 PM   #11
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i know, but it doesn't hurt to make lighting conditions better for your corals, right? and thanks for everyone's help
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Old 09-18-2010, 08:49 PM   #12
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If you're using all 10K's, adding actinics (considering it's PC) will actually be a detriment to your lighting conditions,
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Old 09-18-2010, 08:58 PM   #13
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20watt 24in bulbs are just normal fluorescents.

If you are buying normal output fluorescent tubes, the color won't change the fact that it's really not enough light (par) to keep coral alive.
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Old 09-18-2010, 10:46 PM   #14
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That's what I was trying to determine. Maybe it's just me that's confused as to the output this guy has. It's probably because I'm a newb and don't understand as well.

At any rate, if they are standard fluorescent definitely get the right kind of lights as soon as you can =\
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Old 09-19-2010, 08:27 PM   #15
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yeah, Kamel, I'm pretty new to this too. but what do you mean a detriment to my lighting conditions if i use an actinic? and Jardinop, I know that color of the lighting doesn't matter, and my button polyps have been growing pretty well, but I agree, i probably need to get some better lights soon, since I'm not sure about some details about the lights i have right now.
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