Tropical Fish Keeping - Aquarium fish care and resources

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-   -   metal halide question (http://www.tropicalfishkeeping.com/beginner-saltwater-aquariums/metal-halide-question-63913/)

mvp 02-27-2011 03:09 PM

metal halide question
 
is it possible to use a 36 inch 250W metal halide over a 30 gallon aquarium that is 16 inches in height? it will be about 6 inches above the tank with 3 fans running across the surface. i was just wondering if 250w is to much for a 30 gallon?

1077 02-27-2011 10:07 PM

Quote:

Originally Posted by mvp (Post 604035)
is it possible to use a 36 inch 250W metal halide over a 30 gallon aquarium that is 16 inches in height? it will be about 6 inches above the tank with 3 fans running across the surface. i was just wondering if 250w is to much for a 30 gallon?


Is this for planted tank? If so, You would in my view, need to raise this fixture 18 to 24 inches above the tank unless you wish to grow algae and lot's of it.
Even with pressurized CO2, this would be a lot of light for 16 inches to substrate.

redchigh 03-19-2011 01:46 PM

Quote:

Originally Posted by 1077 (Post 604482)
Is this for planted tank? If so, You would in my view, need to raise this fixture 18 to 24 inches above the tank unless you wish to grow algae and lot's of it.
Even with pressurized CO2, this would be a lot of light for 16 inches to substrate.

Erm, double check the forum you posted that in.
I seriously doubt it's going to be planted.

I'm pretty sure that's a LOT of light, but you could always move the light higher over the tank to lessen the light...
Google 'inverse square law'.


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