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Old 06-04-2012, 10:04 PM   #1
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What to do about light?

I'm setting up my 20H and last thing is what I'm the worst at, knowing what lights to get.. I have this fixture right now:
http://fishneedit.com/t5ho-24quot-2-...quarium-l.html
with either 6500k or 6700k bulbs. Now I'm sure that's not enough light to grow anything. So could I just get another of the same fixture, so I'd have 4 bulbs. And get different bulbs for my current one.

Would that be enough? Also, what bulbs should I get?

Thanks Guys!
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Old 06-05-2012, 11:17 PM   #2
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I have a 20 long and i use a 4 lamp t5 high output fixture and i am able to grow sps corals in there. So yea that should be enough light. Just make sure you get good bulbs. Most fixture are good but they come with bulbs that are no good. I changed all four bulbs in mine as soon as i got it
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Old 06-06-2012, 01:13 AM   #3
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Quote:
Originally Posted by Jabibi
I have a 20 long and i use a 4 lamp t5 high output fixture and i am able to grow sps corals in there. So yea that should be enough light. Just make sure you get good bulbs. Most fixture are good but they come with bulbs that are no good. I changed all four bulbs in mine as soon as i got it
Okay great! Thanks!
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Old 06-18-2012, 12:26 PM   #4
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So what do y'all think about my photoperiod? I know the atcinics need to come on an hour before and go off an hour after, right?
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Old 06-18-2012, 10:46 PM   #5
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Not so sure about the photoperiod myself but definitely change the bulbs!
6700K bulbs are used for growing plants, they emit a certain light spectrum that plants thrive off of, in this case, Algae! Bad stuff! Get 10000K at least
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Old 06-18-2012, 11:01 PM   #6
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Quote:
Originally Posted by armyman16
Not so sure about the photoperiod myself but definitely change the bulbs!
6700K bulbs are used for growing plants, they emit a certain light spectrum that plants thrive off of, in this case, Algae! Bad stuff! Get 10000K at least
I probably should have clarified.. I got 10k's for my fixture. So I'm running 2 x 10k and 2 blues
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Old 06-18-2012, 11:04 PM   #7
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Oh okay nevermind then!
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Old 06-18-2012, 11:04 PM   #8
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I run my T5's, 12 hours actinic, 10 hours daylights.
Actinics on one hour before and one hour after the daylights, like you thought.
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Old 06-18-2012, 11:06 PM   #9
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No. The actinics don't have to come on or off at different times than the daylights. That's just for our enjoyment. Folks like to have a morning and evening transition, but all corals need is a certain amount of light for enough time to sustain them.
Also, a 2 lamp fixture is not enough light to grow anything. It will be enough for soft corals and some lps.
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Old 06-18-2012, 11:14 PM   #10
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Quote:
Originally Posted by mr_X
No. The actinics don't have to come on or off at different times than the daylights. That's just for our enjoyment. Folks like to have a morning and evening transition, but all corals need is a certain amount of light for enough time to sustain them.
Also, a 2 lamp fixture is not enough light to grow anything. It will be enough for soft corals and some lps.
Well I have 4, only 2 are 10k though. The other 2 are actinics. So you're saying I can't grow anything with that..?
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