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  #1  
Old 10/25/2007, 11:20 AM
LegendLand LegendLand is offline
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MH light over water ?

Should i put a glass top between my MH light & the tank water, or leave it open, i know all of Ron's are not shielded from the water besides the glass UV shield on the light fixture, wich my unit also has.
  #2  
Old 10/25/2007, 11:23 AM
firefish2020 firefish2020 is offline
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I run open top as the shields should be enough to protect the bulbs. I don't use glass tops because of heat and reflection issues.
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  #3  
Old 10/25/2007, 01:22 PM
MattG MattG is offline
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I haven't ever used a glass shield and have not had any problems. I have even had a couple of different SE setups with nothing at all between the bulb and water without problems. Of course, do so at your own discretion
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  #4  
Old 10/25/2007, 02:10 PM
odoprelude odoprelude is offline
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Heck my SE bulbs are no more than 5 inches off the surface of my water... just have to take the bulbs out once a week and use vinegar to take off the salt and mineral deposits.. and still the tank temp never gets over 78 degrees...
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  #5  
Old 10/25/2007, 04:43 PM
coralreefer coralreefer is offline
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Quote:
Originally posted by odoprelude
use vinegar to take off the salt and mineral deposits
Who taught you that trick

Open top with SE bulbs here too.
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  #6  
Old 10/25/2007, 04:49 PM
LegendLand LegendLand is offline
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ok thanks, i got a Viper Clip-on lamp, 150w HQI, 14k. looks good, except i hate that blue look makes it look like a low grade light. is it normal for MH lights to get hot, hot enough to burn you when touching the fixture ? it dosent have a built in cooling fan, should i put a fan on it ?
  #7  
Old 10/25/2007, 05:50 PM
odoprelude odoprelude is offline
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Nope, the area underneath the lamp will keep the water cool and have no issues, too hot, raise the lamp... how do you like that viper? I was thinking about one for my nano tank.. let me know if you ever want to sell it..
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  #8  
Old 10/25/2007, 05:52 PM
odoprelude odoprelude is offline
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oh, and MH's are extremely hot.. one of the downsides... think that's hot, you should check out a SE bulb, those are hot!!
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  #9  
Old 10/25/2007, 06:25 PM
mcox33 mcox33 is offline
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Open top with 400 Watt SE here never have used glass. No real splash or salt issues either.
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  #10  
Old 10/25/2007, 08:17 PM
firefish2020 firefish2020 is offline
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Thats a Coralife 14 K bulb not the best show case for 14K bulbs out there as there are far better brands with different looks to each of them.
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  #11  
Old 10/26/2007, 04:05 AM
LegendLand LegendLand is offline
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ok thanks, 1 last question, most sites say that 5 watts of MH per gallon is needed when keeping Acropora, this is over a 30g long tank, 5x30 = 150. it lights up the complete lenght of the tank, this should be enough to keep high light acro's correct ?. forgive me for being behind, ive never tried SPS corals before, only LPS, soft corals & filter feeders

also its in front of a window that gets 7+ hours of direct sunlight each day.
just making 100% sure i got what i need.
tank dimensions are 36'' long 16'' high.
  #12  
Old 10/26/2007, 03:01 PM
odoprelude odoprelude is offline
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how does the direct sunlight affect your tank temp? You will need a source of calcium, kalkwasser drip would probably do you fine for that. Start with Porites, monitpora capricornus, hydnophora, something hardy... put closer to the top, closer to the light...
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  #13  
Old 10/26/2007, 04:47 PM
joyski58 joyski58 is offline
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I've had the Viper over my refugium for about 9 months. It does get hot to touch, and I''ve only got the 70w version. Sure is retro-looking. The ballast is huge though. I also have two of the 150w Aqualight MHs over the display tank, which are very similar to the Viper. All quite adjustable position-wise.
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