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#1
05/05/2007, 11:14 PM
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Leaving the light on 24/7 in a all coral tank?
Just as the title says, I have an all Coral tank (no fish nothing else not even a clean up crew) and I just wanting to know if there is any harm in leaving the MH on 24/7 is harmfull of good for the corals.
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#2
05/05/2007, 11:32 PM
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corals take up Ca when the lights are on and deposit it when they are off, extended photo periods (over 16 hrs) have stunted stony coral growth IME, softies I've had grow perfectly fine in my fuges light 24/7
kc |
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#3
05/16/2007, 10:13 PM
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24/7 say hello to algae
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#4
05/16/2007, 10:23 PM
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Quote:
kc |
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#5
06/10/2007, 07:08 PM
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I wonder if you will feel the same when your electric bill arrives at the end of the month...
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#6
06/10/2007, 10:07 PM
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reef tanks are just like driving SUVs it's up to you to decide if it's worth it or not on your power bill or your gas millage.
kc |
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#7
06/11/2007, 07:48 AM
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While the zooxanthellae are photosynthesizing they pump oxygen into the coral tissue faster than it can diffuse out. By the end of the day the tissues are supersaturated with oxygen and it actually starts to become toxic. They need the dark period to purge themselves of the oxygen. If you kept the light on for 24 hours you would probably see bleaching at the least and outright coral death at the worst.
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Lanikai, kahakai nani, aloha no au ia 'oe. A hui hou kakou. |
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#8
06/11/2007, 03:29 PM
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i keep my refum on 24/7. but if i were keeping m.h.,s on 24/7 i wood run a cord over to my next door nabres home sssssshhhhhhh!
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I like getting WET! |
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#9
06/24/2007, 07:19 PM
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Quote:
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#10
06/26/2007, 01:38 AM
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Does the sun stay out all the time on the reef around the world??
__________________
125g~Zoa dominated~SPS~LPS~Clams~GBTA~S. haddoni~Evil Clowns~Tangs~Leopard Wrasse~Starry Blenny~Flame Angel~Purple Firefish~Gobies~Chromis~2xCleaner Shrimp~2xHarlequin Shrimp~Pistol Shrimp |
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#11
07/08/2007, 08:13 PM
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Greenbean is 100% right, and I'm not just saying that because of the pic. Extended photo periods are very damaging to corals. Intense lighting can cause an otherwise normal light cycle to be to long. Even a modest light fixture ran 24/7 would eventually kill the corals.
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#12
07/18/2007, 09:58 PM
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14 hours max
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#13
07/18/2007, 09:58 PM
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now if you want to use moonlighting thats ok
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#14
07/21/2007, 02:26 AM
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I usually keep the lights on a timer about 10-12 hours. On the few occasions that I have left the lights on too long (overnight cause i passed out drunk, during finals weeks, etc.) I have noticed that the softies especially close up until the light are turned off, and then even are slow to open the next day. I suspect they get the coral's equivalent of a sunburn.
It's an interesting experiment to try 24/7 lighting. You might find that some species love the excess light. You could even try an alternating light cycle, such as 6 hours on, 1 hour off, to see what the minimum amount of darkness is needed for good growth. Do it, try the lighting 24/7. Make I thread and I'll subscribe.
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click the house for my tank thread! |
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#15
08/04/2007, 02:06 AM
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Quote:
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Steve Irwin, still my hero, and never forgotten. |
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#16
08/17/2007, 09:26 PM
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My 54 was left at my old house when I moved, came by and fed the fish and all but it was one of the last things I moved I had one solid electrical bill with nothing but the aquarium and minus all the fees the 250 w MH and PC ran me $40….the MH only stays on 8 hours a day, the PCs like 14 hrs…..
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So, let me get this straight, your Honda has 1.6 liters, whereas my bottle of Mountain Dew has 2? "Americans have the will to resist because you have weapons. If you don't have a gun, freedom of speech has no power." -Yoshimi Ishikawa |
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#18
08/29/2007, 02:13 AM
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1) Photosynthesis does not occur in the dark- different mechanisms take dominate at that point.
2) You Will get more algae growth. Noones tank is totally void of nutrients, and without light as a limiting factor, algae will be better able to use those free nutrients. 3) The problem with leaving lights on 24/7 is that you can over do it. As others have noted, there is a point when the tissue becomes at risk for oversaturation of oxygen, and it becomes toxic; Photoinhibition can be lethal in a short period of time.
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Reaching up and reaching out and reaching for the random, or whatever will bewilder me. Have Some Personal Accountability |
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#19
09/03/2007, 05:44 PM
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Too Much Light!
Here's an article, entitled "Too Much Light!" by Dana Riddle: http://www.advancedaquarist.com/issu...04/feature.htm
Apparently, certain corals shut down photosynthesis during mid-day sun. These corals photosynthesize only during periods of lesser light such as mid-morning or mid-afternoon. |
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#21
10/04/2007, 11:46 AM
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yes you are trying your best to mimic what their natural enviroment would produce. I wouldnt run the lights 24/7 no point to it.
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Everyone you meet, knows something you don't. |
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#22
10/05/2007, 10:18 PM
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well i am new to this sight but i know quite a bit about photosynthesis and such............like someone pointed out it does not happen in the dark........respiration does.......photosynthesis uses light and co2 and h2o to creat sugars..........those sugars are then broken down at night through respiration which breaks down those sugars in the presence of oxygen to release the enerygy from the sugar.....thats why your oxygen is used up at night......and thats why light and dark cycles are needed.......i hope I got that all out correctly
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#24
10/08/2007, 08:28 PM
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For the folks leaving the fuge lights on 24/7. In my tests, Chaetomorpha Sp. actaully had an increased growth rate when using a timer with a 12on/12off cycle.
From the observation of pH, I noted that after the first 5hrs or so, the pH is no longer held stable from the fuge being lit. I now run 2 fuges each on a 6hr photoperiod. The algae growth in the display is lower than ever before, the pH is more stable than it has ever been, and the rate of macro algae growth is increadible. It also costs no extra lighting power to run 2 fuges with 6hr lighting cycles than 1 fuge with a 12hr lighting cycle. Lights on, the plant inhales. Lights off the plant exhales. They are equally important. Plants will just stop and exhale when they become saturated, however, for corals it will be fatal. |
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#25
10/26/2007, 11:57 AM
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ummmm if you think about it, the ONLY place that comes close to having the sun out all the time is the north pole. Everywhere else in the world the light lasts for 10 hours but in reality if you think about it the sun is not the same intensity for those 10 hours. So if what we are doing is recreating the ocean enviroment, ask yourself where in the world is the sun out 24/7, with consistant intensity with oceans that host coral ?
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