How high should lights be?

phishman · 04-24-2008, 12:33 PM

I have a 175 watt 1100k MH over a 28 gallon all glass tank. How high should the light be above the tank? I have a few sps, leathers, starpolyps, clove polyps and zoas. everything but the leather and the pocillipora are growing and doing great. all parameters are perfect I have the light 18 inches above the tank now. is that to high?

AQTCJAK · 04-24-2008, 12:34 PM

I would do 12"

BigAl07 · 04-24-2008, 12:39 PM

I'd drop it down like Jack suggested and see how everything reacts. There's no "hard & fast rule" and your tank will let you know when it's wrong

too high less growth
too low bleaching and heat build-up

Whiskey · 04-24-2008, 02:51 PM

I would drop it down slowly ending at 6-9" off the water depeding on how much splashing you do.

Whiskey

phishman · 04-25-2008, 07:21 AM

Thanks for the info. I will lower it a few inches a day over the next week.

04-24-2008, 12:33 PM	#1 (permalink)
phishman Tubeworm Join Date: Feb 2008 Posts: 30 View Gallery Karma Komment	How high should lights be? I have a 175 watt 1100k MH over a 28 gallon all glass tank. How high should the light be above the tank? I have a few sps, leathers, starpolyps, clove polyps and zoas. everything but the leather and the pocillipora are growing and doing great. all parameters are perfect I have the light 18 inches above the tank now. is that to high?

04-24-2008, 12:34 PM	#2 (permalink)
AQTCJAK Tiger Shark Join Date: Aug 2007 Posts: 6,937 View Gallery Karma Komment Add yours!	Re: How high should lights be? I would do 12" __________________ A Wiseman once said build a stage add a pole & they will dance - Jack 2007 www.aquaticaggression.com Projects & Chronicels http://www.reefsanctuary.com/forums/...car-buffs.html http://www.reefsanctuary.com/forums/...nts-tanks.html

04-24-2008, 12:39 PM	#3 (permalink)
BigAl07 Reef Addict (hopeless) Join Date: Mar 2007 Location: Waynesville, North Carolina Posts: 10,619 View Gallery Karma Komment Add yours!	Re: How high should lights be? I'd drop it down like Jack suggested and see how everything reacts. There's no "hard & fast rule" and your tank will let you know when it's wrong too high less growth too low bleaching and heat build-up __________________ Allen Allen's testimonial . . ."Let Me help you help YOURSELF" (Click Here) with a SW set up there is one basic fundamental rule that we ALL should follow *When in doubt... wait it out. This means take it slow and let the tank "develop" and don't rush it. Time is your friend Ask me about how to increase your REEF budget without going without FOOD!!* Big Al's 10g Julie's (BigAl's Gal) 6g NanoCube BigAl's Slow 90g Tank Chronicle Allens OFFICE 12g Nano-Reef Reef Balls & Cakes Debt Free & Change your Family Tree!!

04-24-2008, 02:51 PM	#4 (permalink)
Whiskey Just some guy, you know? Join Date: Mar 2007 Location: Phoenix, AZ Posts: 850 View Gallery Karma Komment	Re: How high should lights be? I would drop it down slowly ending at 6-9" off the water depeding on how much splashing you do. Whiskey __________________ I'm the guy that ruined it for everyone. I say, what occurs to me to say, when it occurs to me to say it, much more I cannot say. Stop by and welcome me to RS,.. this takes you direct to my new pics: http://www.reefsanctuary.com/forums/...tml#post356787

04-25-2008, 07:21 AM	#5 (permalink)
phishman Tubeworm Join Date: Feb 2008 Posts: 30 View Gallery Karma Komment	Re: How high should lights be? Thanks for the info. I will lower it a few inches a day over the next week.

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