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Old 11-14-2007, 09:08 PM   #11
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Are you supposed to add the actinics in when computing watts per gal? Or just the Halides, VHO, T5,etc...

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Old 11-14-2007, 09:36 PM   #12
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Yes they count too. I have two 160 watt 50/50 bulbs and 2 160 watt super actinic bulbs.

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Old 11-20-2007, 02:37 AM   #13
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Please Help

I believe I found the fixture I want to go with. It will give me 440watts of VHO lighting. It is 2x 50/50 bulbs and 2x super actinic bulbs at 110watt each. The only bad part is there is only 1-switch so I can't create dusk/dawn. My plan is to use my current NO 40watt fixture to create this effect. This gives me 480watts at 6.4 watts per gallon for my 75gallon tank, which is only about 18" deep. Is this too much light for my fish, or do you think I will be ok? I have a hippo tang, 2-clowns, 5-green chromis, 2-cleaner shrimp. If I have to, I can go with a 3-lamp VHO giving me almost 5-watts per gallon, if that is better for my fish??? Thank You.
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Old 11-20-2007, 01:08 PM   #14
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That's about the same wpg that I have. You should be fine with all but the most light demanding species.

I've photo acclimated my tank in the past for my corals when I changed fixtures. Your fish will get used to the lighting.

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watts, watts per gallon

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