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Old 10-01-2014, 12:40 PM   #11
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The temperature is the color. That means the temperature varies and depends to your mixture.
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Old 10-01-2014, 01:04 PM   #12
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Are you saying that regardless of the color intensity (PAR) the algae doesn't care? And do you really believe algae is not sensitive to specific frequency?
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Old 10-01-2014, 01:22 PM   #13
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I am specifically saying that if you mix this




with this




You are getting a hearty mixture of yellows, greens, blues, purples, and reds. This is what is happening with the Taotronic LED panels that many many people use. Regardless of how much you crank up the actinic lights, you are still getting that mixture of colors.

I will accept that the spectrum will change over time for fluorescent bulbs, but I do not accept that those mixtures of yellows, reds, and greens cause algae blooms. There are other more important factors at play in algae blooms than light temperature.

On a funny note, the fresh water crowd says that color temperatures above 10000k cause algae growth. The salt water crowd says the opposite. Kind of a strange thing don't you think?
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Old 10-01-2014, 01:42 PM   #14
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Each variety of algae may flourish on a different frequency band. That is why you see different colors of algae. Dark colored absorbs the white and reflecting the color you see.
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Old 10-01-2014, 02:03 PM   #15
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The ratio of colors in a flourescent lamp change as it gets older and the frequency band may shift as gas changes composition.
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Old 10-01-2014, 03:02 PM   #16
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Quote:
Originally Posted by jeffaquarius View Post
Each variety of algae may flourish on a different frequency band. That is why you see different colors of algae. Dark colored absorbs the white and reflecting the color you see.
Yet the same algae plagues both fresh and salt water. Namely: green spot, hair, and diatoms
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The ratio of colors in a flourescent lamp change as it gets older and the frequency band may shift as gas changes composition.
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Old 10-02-2014, 01:48 AM   #17
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All I am saying is that algae prefers the white light than blue. It's not the only cause of algae bloom but it accelerates it. It's not just the color either but the intensity of the color or the PAR. Now if you have both white and blue fluorescent lamp, overtime the frequency band of the blue may shift towards the white (red, green and yellow) so now what you get is more intensity of the white than blue which favors your algae. If you are using 5600k in your sump for your macro algae doesn't that answer the question why white is more efficient than blue for your algae?
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