how high should halide be off the water?

bongobrian · 01-22-2003, 10:17 AM

Hey guys, I'm gonna start building a canopy for my 46 bow. I'm probably gonna end up with a 10,000k 175w metal halide or something comparable. I'm just wondering how tall should I build the canopy... in other words, how high off the water should the MH be? I was thinking 10-12" should be enough. What do guys recommend?

**kevinpo** · 01-22-2003, 12:08 PM

I'm running my 400W bulbs 8" off the tank top and 9" off the water surface. They are mounted in PFO reflectors.

HTH,
Kevin

Chris Lakies · 01-22-2003, 01:40 PM

I'm running my 175 Ushio 10K's about 4 inches off the water surface. I would not suggest this because there is a risk of water hitting the bulb and breaking it. Hopefully nothing happens from now until I set my 120 gallon up. I will be making my own hood and the lights will be about 10" off the water (2-400 watt 2-175 watt).

ChrisIsBored · 01-23-2003, 06:10 AM

Unless your tank has a lot of turbulent water at the surface, there's no reason you can't have your MH bulbs as low as 4" off the water. The only disadvantage would be added heat/evaporation.

I'm have my 250W's setup 7 inches off the waters surface.

01-22-2003, 10:17 AM	#1
bongobrian Mayor Join Date: Sep 2001 Location: Ann Arbor, Michigan Posts: 657	how high should halide be off the water? Hey guys, I'm gonna start building a canopy for my 46 bow. I'm probably gonna end up with a 10,000k 175w metal halide or something comparable. I'm just wondering how tall should I build the canopy... in other words, how high off the water should the MH be? I was thinking 10-12" should be enough. What do guys recommend? __________________ Brian For those about to rock... I salute you! www.bongobrian.com Talk to me! aol: bongobrian78 msn: bongobrian@hotmail.com yahoo: bongobrian78

01-22-2003, 12:08 PM	#2
kevinpo Moderator Join Date: Oct 2001 Location: Spokane Valley WA Posts: 2,460	I'm running my 400W bulbs 8" off the tank top and 9" off the water surface. They are mounted in PFO reflectors. HTH, Kevin __________________ SPSguy On - On

01-23-2003, 06:10 AM	#4
ChrisIsBored Reefland Lurker Join Date: Aug 2001 Location: San Antonio, Tx Posts: 47	Unless your tank has a lot of turbulent water at the surface, there's no reason you can't have your MH bulbs as low as 4" off the water. The only disadvantage would be added heat/evaporation. I'm have my 250W's setup 7 inches off the waters surface. __________________ Progress of my 200G tank Marine Aquarist's Association of South Texas

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01-22-2003, 01:40 PM	#3
Chris Lakies Council Join Date: Feb 2002 Location: Utica Mi. Posts: 270	I'm running my 175 Ushio 10K's about 4 inches off the water surface. I would not suggest this because there is a risk of water hitting the bulb and breaking it. Hopefully nothing happens from now until I set my 120 gallon up. I will be making my own hood and the lights will be about 10" off the water (2-400 watt 2-175 watt).

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