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08/25/2009, 12:12 PM
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#1 |
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Registered Member
Join Date: Jan 2009
Location: Joliet IL
Posts: 1,040
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400w Meatl Halide
How far should 400 watt metal halide reflectors be away from the water?They are Lumenarc reflectors.Also how do I keep from shocking the coral?I am going from t5 to 400 watt MH.
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08/25/2009, 12:26 PM
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#2 |
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Registered Member
Join Date: Aug 2009
Location: Plano, TX.
Posts: 109
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I think the general consensus is that the bulb needs to be something around 6-8 inches above the water. This is because of IR heating and to avoiding splashing the fixture.
To avoid over-illuminating your corals, you might need to move it further--depends. Start conservative and slowly bring them closer. |
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08/25/2009, 12:29 PM
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#3 |
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Registered Member
Join Date: Oct 2007
Location: FLORIDA
Posts: 297
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I put my 400's about 13" above the water line. Just monitor the water temperature. I also have an intake and exhaust fan in my canopy blowing on the water surface as well. If temperature is high you might want to add fans or place higher.
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08/25/2009, 12:42 PM
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#4 |
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Registered Member
Join Date: Jan 2006
Location: Destin, Florida
Posts: 700
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When I had 400's I ran them 5" above the water.
I just switched to an ATI Powermodule (T-5) and it was a shock to the corals. |
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08/25/2009, 01:22 PM
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#5 |
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Registered Member
Join Date: Mar 2006
Location: Pulaski, WI
Posts: 1,368
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Somewhere between 5" and 13" above the water. I think most place their MH lamps about 8 or 9 inches above the water.
__________________
SG - 1.025 pH - 8.1 NH4/NH3 - 0 mg/L NO2 - .003 mg/L NO3 - .2 mg/L Calc. - 420 dKH - 8.0 Flow ~ 80x Current Tank Info: 24" cube SPS Reef, 15 gal sump, 1- LumenBright Pendant with 250w 20K Phoenix lamp, 1 - Vortech MP40, ATB 840 v1.5 skimmer. |
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08/25/2009, 05:21 PM
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#6 |
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Registered Member
Join Date: Jan 2009
Location: Joliet IL
Posts: 1,040
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Thanks for all the info.
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