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Old 07-16-2013, 10:47 PM   #11
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I would love to get a bicolour dotty back as its about half the price of a royal gramma but I've heard they're as aggressive as damsels.
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Old 07-16-2013, 11:41 PM   #12
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my light is about 20 inch above the tank
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Old 07-17-2013, 12:13 AM   #13
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Seen a bi color dotty tonight looked like someone dipped oneside then the other. One db is good just like some fish they can have their moment.
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Old 07-17-2013, 12:22 AM   #14
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my light is about 20 inch above the tank
Jeez. Does it have to be that high? I was hoping for 6-8". One foot at the very most.
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Old 07-17-2013, 12:35 AM   #15
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these lights are strong and 20 inch isn't really that high
I run mine about 50%
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Old 07-17-2013, 02:12 AM   #16
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With 120 degree optics if they are that far from the tank there will be tons of light spill over.
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Old 07-17-2013, 02:27 AM   #17
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So is there a right or wrong answer to this question then? How do I know how high is too high and how low is too low?
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Old 07-17-2013, 03:03 AM   #18
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At 20 inches I don't have any light spill over on my 40 B
and I get nice coverage of the tank



I keep SPS , LPS , and softies and it's all doing great
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Old 07-17-2013, 03:43 AM   #19
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So is there a right or wrong answer to this question then? How do I know how high is too high and how low is too low?
You are really going to have to experiment. When you go to hang the lights just make it so that the lights are adjustable. They are high enough when they give good coverage without having issues with spotlighting anything.
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Old 07-17-2013, 11:35 AM   #20
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I would go about 10" and slowly turn them up. Lots of people on here run them less than 50 percent. Mine are around 40/30 and more than enough light.
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