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Old 12-28-2004, 05:00 PM   #1
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Does in sump LR need light?

If the answer is yes, how much?
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Old 12-28-2004, 05:10 PM   #2
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the purpose of live rock in a sump is for bacteria for the nitrogen cycle. These organism need no light to survive.
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Old 12-28-2004, 05:15 PM   #3
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thank you, thats what I thought but wanted to make sure.
I'm terrible in chemistry
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Old 12-28-2004, 05:18 PM   #4
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mattmku is right on the bacteria. A lot folks will also put algaes in their sumps for additional nutrient export. These, obviously, would need some light. But you could easily get away with a simple 20watt NO fixture.
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Old 12-28-2004, 05:22 PM   #5
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What I did was to put my lights on a timer opposite my tank lights, I may not need it in my sump/ref. but it keeps my o2 level even. I was told once that your o2 level drops like a rock when you turn out the lights so I put the light in. I have 2 40 watt "grow" lights for my sump.
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Old 12-28-2004, 10:27 PM   #6
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i have lots of lights on my sump. i figure the more plant life, the more oxygen. i like the idea of oposing the light cycle to keep o2 levels even. thats really cool
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Old 12-28-2004, 11:07 PM   #7
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i like the idea of oposing the light cycle to keep o2 levels even. thats really cool

I heard it here first.
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Old 12-28-2004, 11:39 PM   #8
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Sorry guys, me and chemistry

What has light to do with o2?
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Old 12-29-2004, 12:57 AM   #9
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when the plants are well lit the plants take in co2 and put out o2. during the night they stop producing o2 and even release a small amount of co2. therefor, durring the night (or when the plants arn't lit) there is a large drop in o2 levels.
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Old 12-29-2004, 01:35 AM   #10
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when the plants are well lit the plants take in co2 and put out o2. during the night they stop producing o2 and even release a small amount of co2.

Thanks, can I have some more Info?
Plants on the live rock? Algea?

Looks like I faild my Biology class too
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