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Old 09-09-2005, 09:30 PM   #1
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Best Light Spectrum for Coraline Growth

I've heard the bluer the better. Would getting another actinic or a 20k bulb be best (to replace my very pink looking bulb, not sure the temp, but it is pink compared to my 12k)
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Old 09-09-2005, 11:42 PM   #2
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IMO, correct alkalinity, mag, and calcium levels are more important than color spectrum. Intensity has done more to vary the coralline algae in my tank...under my halides my tank walls have been covered in pink instead of the purple in my PC lit tanks.
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Old 09-10-2005, 11:53 AM   #3
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pink bulb...sounds like the 9325K GE bulb. good for plants, but I think it'd look odd in a reef tank.

As Hoops said, alk, cal, and Mg levels are more important for coraline growth than light intensity or spectrum.
I run one Actinic 03 and one 10,000K daylight. my coralline goes crazy as long as I keep up with alk and calcium dosing (Mg is never a problem for me)
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Old 09-10-2005, 01:49 PM   #4
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That's probably close to the temperature. I know it's a 32 watt "all glass aquarium" 48 inch bulb that came with a NO strip light I bought at Petco. Drfostersmith has all glass bulbs same discription as mine and it says they're 8000k.
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Old 09-10-2005, 04:49 PM   #5
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I agree with the others...
I have a 48" NO light strip on my fowlr and I run URI bulbs, 1 40 watt super actinic and 1 40 watt actinic white and I have tons of coraline on the LR.
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