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Old 12-28-2004, 12:09 AM   #1
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'Fuge lighting

Planning a 30 gal refugium with 18" in the middle for caulepra and other macros.

Does the algae require any special lighting? I have heard conflicting ideas about using freshwater lights, NO lights for plants from gardening store and then even PCs.

What do most folks use? I only need 18" covered and its in my stand so looks dont matter that much, but as always cost does.
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Old 12-28-2004, 11:03 AM   #2
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I have a new CPR Refugium that has NO lights.
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Old 12-28-2004, 11:14 AM   #3
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What is the wattage and K of your NO light?
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Old 12-28-2004, 12:10 PM   #4
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The wattage is not that important as long as the fuge is not too deep. The main concern is the kelvin rating. If you can find a decent NO striplight and a bulb in the range of 10,000k your good to go. Lower kelvin rated bulbs (<7100k) are more to the red spectrum which will promote nuisance alages.

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Old 12-28-2004, 12:54 PM   #5
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Quote:
Lower kelvin rated bulbs (<7100k) are more to the red spectrum which will promote nuisance alages
Steve,
So a 50/50 would not be a good choice for a fuge, or does the actinic balance the 6700k white?
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Old 12-28-2004, 02:04 PM   #6
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The actinic will not balance the 6700k, the light spectrum will continue to be emitted. The 03 spectrum just gives the "visual" appearance of balance. If your speaking of PC bulbs, 50/50's come in 10k as well.

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Old 12-28-2004, 02:05 PM   #7
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most 50/50's I see are 10,000k/Actinic...not a 6700K/Actinic.
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Old 12-28-2004, 02:07 PM   #8
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I thought the refugium lighting should be more in the lower kelvin range 5-7000 because the alga uses chlorophyll instead of the zooxathellae (sp?) in corals.

I thought wattage stimulated more growth. Numerous exmaples on the website of growth improving with higher watts.
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Old 12-28-2004, 02:07 PM   #9
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They actually come in both, although lower wattage 50/50 bulbs are typically 10k.

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Old 12-28-2004, 02:28 PM   #10
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Quote:
Originally Posted by sipe
I thought the refugium lighting should be more in the lower kelvin range 5-7000 because the alga uses chlorophyll instead of the zooxathellae (sp?) in corals.
All algaes (which are not true vascular plants) usually contain some form of chlorophyll (usually a & c) . Zooxanthellae is made up of dinoflagellates which also contains chloroplyll. All requiring some sort of photosynthesis to survive. With macro algaes specifically, they tend to prefer the higher spectrum (450ish nm) with some red spetrum in the mix. With the higher spectrum you can control which algaes dominate over the lesser micro algaes which will fluorish in lower red spectrum outputs. It's just a matter of controlling which you are trying to propogate.

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I thought wattage stimulated more growth. Numerous exmaples on the website of growth improving with higher watts.
It really depends on the specific species of algae. In general it's safe to say a majority will do well in non typical reef lighting. They are increadibley adaptive and can do equally well in 1-2 watts/gal upto 4. Spending a whack of $$ on lighting for a refugium is not necessary.

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