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02/09/2009, 01:18 PM
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#1 |
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Registered Member
Join Date: Aug 2008
Location: Novi, MI
Posts: 1,550
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What's the reasoning behind a reverse lighting schedule?
Well as the title pretty much says I'm curious why some people light their refugiums on a time period opposite that of their main tank.
Is there a specific reason? Is there some benefit to a reverse lighting schedule? |
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02/09/2009, 01:24 PM
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#2 |
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Registered Member
 
Join Date: Jul 2007
Location: Newport, RI
Posts: 218
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It keeps the PH more stable. Less of a PH drop at night.
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02/09/2009, 01:32 PM
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#3 |
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Moved On
Join Date: Jan 2009
Location: Flint, MI
Posts: 1,274
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02/09/2009, 01:35 PM
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#4 |
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Registered Member
Join Date: Aug 2008
Location: Novi, MI
Posts: 1,550
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Interesting-since I really like to know the why's of things....why?
 Or to word it differently, how does it keep the pH stable?
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02/09/2009, 01:44 PM
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#5 |
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Registered Member
Join Date: Feb 2007
Location: Derby CT
Posts: 2,861
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I am interested in this also. I am thinking that maybe heat from the light or maybe the growth or release of something from macroalgae stabilizes PH
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02/09/2009, 01:51 PM
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#6 |
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Registered Member
Join Date: Jan 2008
Location: NYC transplant now in CT
Posts: 1,501
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Long story short......Ph reaches it peak after full lighting and drops off after lights out....Reverse lighting allows the sump and refuge inhabitants microalgea included to go to work on waste and bacteria and that stabilizes your PH.....
Brian
__________________
I'd Rather be a failure at something I love , Than a sucess at something I hate . George Burns Current Tank Info: 150 DD Cube / 100 Gal Sump(basement) 30gal cube frag tank plumb Panworld 250ps return/ Reef Octopus SRO3000 Skimmer/ Bubble Magus Doser/Lumenmax reflector with 400 watt Radium bulb Ice Cap Ballast Apex Controller 2 MP40wes 2 gyre 150 |
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02/09/2009, 01:52 PM
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#7 |
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Moved On
Join Date: Jul 2000
Location: Stockton, CA
Posts: 14,854
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02/09/2009, 01:54 PM
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#8 |
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Registered Member
Join Date: Jul 2007
Location: Baltimore, MD
Posts: 2,664
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I'm no chemist, but . . . pH and dissolved CO2 are very much related. pH rises as CO2 leaves the system, and drops as CO2 is added to the system. During the day, carbon dioxide is reduced through photosynthesis, and this reduction is offset by respiration of our fishes. In the typical reef aquarium, the amount of CO2 removed through photosynthesis during the day exceeds the amount produced through respiration. Thus, in the typical reef aquarium, pH will rise during the day as CO2 drops, and will fall at night as CO2 rises. If you add in a refugium with macroalgae and light it on a reverse cycle, that macroalgae is removing CO2 through photosynthesis while the rest of your system is producing CO2. I think Randy Holmes-Farley did a nice piece on this process that you should be able to find easily.
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02/09/2009, 01:54 PM
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#9 | |
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Moved On
Join Date: Jan 2009
Location: Flint, MI
Posts: 1,274
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Quote:
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02/09/2009, 01:56 PM
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#10 |
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Registered Member
Join Date: Jul 2007
Location: Baltimore, MD
Posts: 2,664
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Ha, Cloak beat me
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02/09/2009, 02:09 PM
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#11 |
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Reef Monkey
Join Date: Sep 2005
Location: Rockledge, Fl
Posts: 5,759
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edit: it looks like I just repeated what abulgin said (and he said it better). . .that's what I get for taking so long to hit the send button.
__________________
All opinions in the above message should be taken with 35 ppt salt. -Mike C. Current Tank Info: I have a reef screen saver on my phone, does that count? |
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02/09/2009, 10:24 PM
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#12 |
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Registered Member
Join Date: Aug 2008
Location: Novi, MI
Posts: 1,550
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Nice-thanks for the explanation guys I appreciate it.
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