Northeast Florida Marine Aquarium Society  | Our purpose is to enhance the hobby by promoting the exchange of information, equipment, and livestock. We are located in NE Florida within the Great City Of Jacksonville and welcome all to join from both the surrounding areas and from distant locations. Check us out at www.nfmas.org |
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11-12-2007, 05:19 PM
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#1
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Plankton
Join Date: Oct 2007
Location: Atlantic Beach
Posts: 16
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lighting-how much is too much
I currently have (2) 175w MH, and (3) 96w actinics running on my 75gallon. I have two 400w MH setups that I'm not using and was wondering if it would be beneficial to add one to my tank. I was thinking I could mount it directly in the center, which would be above the rest of the lights. Besides cooling, are there any other downfalls to this?
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11-12-2007, 05:56 PM
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#2
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I want it all..bag it up!
Join Date: May 2007
Location: Jacksonville,FL
Posts: 621
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2 175's plus a 400 would be a LOT of light and would make the water temp go up pretty warm. My 400 MH will make the temp on my 265g go up at least 6 degrees if ran for only 6 hours. I think too the 400's are for deeper tanks so you probably don't need to go that high on the wattage to get the light penetration you need.
In my 265 I run (2) 250 MH's (1) 400MH (4)VHo blue actinics
I think it would be too much but I"m sure others will have some input too.
Welcome to the club
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may you always have a dollar in your pocket & sand in your shoes
Last edited by Kimberfish; 11-12-2007 at 07:02 PM.
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11-12-2007, 06:49 PM
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#3
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Little Fishy
Join Date: Jun 2007
Location: Florida
Posts: 90
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I agree, I think that a 400 in addition to what you have would be too much (SPS or LPS?). I'm only running (1) 250 MH along with three VHO's totally 245w in my 92, which is 24" deep and everything is doing fine. IMO
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hmmm....what can I get next?
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11-12-2007, 06:51 PM
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#4
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Pinch That Penny
Join Date: Mar 2007
Location: Redmond Oregon
Posts: 2,134
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sell the 175's and 400's and go with 2 250's just my .02
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Home of the $0.00 Nano 
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11-12-2007, 08:00 PM
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#5
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Protect the Worlds Reefs
Join Date: May 2006
Location: Florida
Posts: 1,079
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I would go with an all t-5 setup. Forget the MH with the 75g. Save yourself on electricity, heat issues and cost of bulb replacement.
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11-12-2007, 08:11 PM
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#6
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Salty Supply TRT Sponsor
Join Date: Sep 2007
Location: Orlando, Florida
Posts: 484
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You are ok with just the 2 175w
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11-12-2007, 09:31 PM
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#7
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Shark
Join Date: Apr 2006
Location: Jacksonville
Posts: 1,111
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The 175s are fine with a tank your size.
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When you think you know it all..................
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11-15-2007, 09:57 PM
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#8
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Rob's Reef Owner
Join Date: Jan 2002
Location: Orange Park, FL
Posts: 432
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On my 75 I ran 2x250w MH and 4x110w VHO for 940w/12.5wpg.
Stuff grew well.
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11-16-2007, 08:06 AM
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#9
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Protect the Worlds Reefs
Join Date: May 2006
Location: Florida
Posts: 1,079
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I am not one for referring to another site, but check out reefcentral, look under lighting or do a search and see what people are running on their 75g's. You could actually research for hours.
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11-16-2007, 09:01 AM
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#10
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Bad Fish
Join Date: May 2006
Location: Dalton Ga.
Posts: 192
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I replaced my 175w with a 250w on my 22g nano I have not had any heat issues .It may be overkill but eaverything grows like weeds. IMO once acclimated most corals can handle any light you throw at them. Depending on what bulbs you run there may not be a huge diff. say you are runing 175 iwaski 14k(spelling) then go to a 400w 20k xm there wont be much PAR diff. and as far as heat ,well placed fans can work wonders.
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11-16-2007, 12:50 PM
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#11
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Pinch That Penny
Join Date: Mar 2007
Location: Redmond Oregon
Posts: 2,134
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I have 2x175 on my 18 inch 50 gallon and I would like more
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Home of the $0.00 Nano
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11-16-2007, 12:59 PM
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#12
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Enjoy it now
Join Date: Aug 2005
Location: Chattanooga, TN
Posts: 4,087
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is your tank BB? if so, and you tried putting those extra lights on, you'd FRY everything
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11-16-2007, 01:15 PM
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#13
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Protect the Worlds Reefs
Join Date: May 2006
Location: Florida
Posts: 1,079
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Quote:
Originally Posted by luvmylo
I have 2x175 on my 18 inch 50 gallon and I would like more
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I had a 4x54w icecap t-5 retro over my 55g and it was some serious light. I could grow anything and everything and everything grew like weeds. I had xenia, zoos etc growing on my back glass. For only 18inches, IMO, MH are not needed if you have the righ t-5 setup, and there are no heat issues.
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11-16-2007, 09:35 PM
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#14
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Rob's Reef Owner
Join Date: Jan 2002
Location: Orange Park, FL
Posts: 432
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Quote:
Originally Posted by DarthOcellaris
is your tank BB? if so, and you tried putting those extra lights on, you'd FRY everything
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Why would it fry everything? The undersides of corals actually get more light with a sandbed.
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11-16-2007, 10:14 PM
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#15
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Enjoy it now
Join Date: Aug 2005
Location: Chattanooga, TN
Posts: 4,087
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Quote:
Originally Posted by Robwsup
Why would it fry everything? The undersides of corals actually get more light with a sandbed.
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The lack of nutrients in the water column allows more light to penetrate. You don't need as much light with a BB than one with sand.
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