Too Much Light for 75 gallon tank

tyreeftank · 01/11/2010, 09:19 PM

Is two 250 Watt Metal Halide too much for 75 gallon tank? It seen to kill all of my coralline from the the live rock.

sedor · 01/11/2010, 09:26 PM

Sounds perfect to me, that what I run

Is there glass under the bulbs. Sometimes that is there to protect from UV rays. Its been known when people removed the glass or it got cracked to bleach corals.

scottwhitson · 01/11/2010, 10:53 PM

I run 2 400 watt halides on a 75 so 250's shouldn't be causing your problems.

ReefTECK · 01/11/2010, 11:02 PM

yeah no problem there, I'm using close to 800 watts on top of a 7 with metal halides and VHO T5's combined.

tyreeftank · 01/12/2010, 09:11 AM

Sedor, yes there is glass under the bulbs. Thanks for the feedback.

derek4real · 01/12/2010, 09:14 AM

glass shield is only needed on DE bulbs.

mrbigshot · 01/12/2010, 09:45 AM

Coraline hates light, good news is it will usually come back in a different color that like the light more. usually a pink or red.

01/11/2010, 09:19 PM	#1
tyreeftank Registered Member Join Date: Apr 2007 Location: Chicago Posts: 79	Too Much Light for 75 gallon tank Is two 250 Watt Metal Halide too much for 75 gallon tank? It seen to kill all of my coralline from the the live rock.

01/11/2010, 09:26 PM	#2
sedor Registered Member Join Date: Sep 2007 Location: Charlotte, NC Posts: 4,689	Sounds perfect to me, that what I run Is there glass under the bulbs. Sometimes that is there to protect from UV rays. Its been known when people removed the glass or it got cracked to bleach corals. __________________ Ryan

01/11/2010, 11:02 PM	#4
ReefTECK Registered Member Join Date: Apr 2007 Location: Iowa City, Iowa Posts: 901	yeah no problem there, I'm using close to 800 watts on top of a 7 with metal halides and VHO T5's combined. __________________ 2013 President of the Greater Iowa Reef Society www.iowareefs.org Current Tank Info: 120 Gallon Tank, 96 DIY LED's on 3 channels, 30gal sump/fuge, 4x2x0.5' & 40gal frag tank, SRO Ca rxr, GSA Kalk rxr, SRO 3000 skmr, Gen-X PCX40 Return, 2xMP40w's, 1xTunze 6101, 140lbs LR, SSB, SPS all the way!

01/11/2010, 10:53 PM	#3
scottwhitson Registered Member Join Date: Feb 2005 Location: Lewiston, Idaho Posts: 1,395	I run 2 400 watt halides on a 75 so 250's shouldn't be causing your problems.

01/12/2010, 09:11 AM	#5
tyreeftank Registered Member Join Date: Apr 2007 Location: Chicago Posts: 79	Sedor, yes there is glass under the bulbs. Thanks for the feedback.

01/12/2010, 09:14 AM	#6
derek4real Registered Member Join Date: May 2007 Location: Dallas, TX Posts: 451	glass shield is only needed on DE bulbs.

01/12/2010, 09:45 AM	#7
mrbigshot Registered Member Join Date: Mar 2008 Location: mn Posts: 387	Coraline hates light, good news is it will usually come back in a different color that like the light more. usually a pink or red.