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Old 04-18-2011, 06:59 PM   #1
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General reef lighting question

I have a 4 bulb tek t5 light set up which is hung by cables from the ceiling and is totally adjustable as to how far you can place the lights over the water ,..so how far above the water is a reasonable height? Thanks,Dary
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Old 04-18-2011, 07:28 PM   #2
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4"-6" is probably the best. Too high up and you loose too much PAR. Too close and you get water splashing on them.
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Old 04-18-2011, 07:31 PM   #3
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As close as possible, with safe air flow in-between, and no splashing
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Old 04-18-2011, 08:10 PM   #4
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Thanks for the responses,..one further question,..how does the lighting closeness effect the growth of algea or does it? ... Thanks again , Dary
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Old 04-18-2011, 10:09 PM   #5
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I am a sole believer that algea growth has to do with mostly water quality
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Old 04-19-2011, 01:30 AM   #6
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I am a sole believer that algea growth has to do with mostly water quality
To an extent. I agree it has a big part of it, but algae will not grow without light.
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Old 04-19-2011, 09:15 AM   #7
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Yes I relize this. But what I meant was it doesn't matter how much light you have the algea will not get bad if you have good water. Unless less of coarse you are using sunlight.
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Old 04-19-2011, 09:50 AM   #8
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Yes I relize this. But what I meant was it doesn't matter how much light you have the algea will not get bad if you have good water. Unless less of coarse you are using sunlight.
Why is it when there is an algae out break in my tank and the only thing I do is change the bulbs does it start dieing back with in a couple of days? I keep with the same 20% water change, food and light schedule.
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Old 04-19-2011, 12:04 PM   #9
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I'm not really sure, I know that the color of light that the bulb puts of starts to get weak, perhaps the bulbs start putting off red light. I don't really know.
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Old 04-19-2011, 12:22 PM   #10
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As far as I know when bulbs start dieing they produce more red light which plants use to grow. New bulbs aren't producing the red light needed so the algae will die off. I use red leds to grow plants indoors (to cold to grow year round in ak) and those lights cause some of my plants to grow as much as 2-3 inches in a week. So I'm going to guess the same would be true for aquatic plants.
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