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post #1 of 3 Old 02-27-2011, 04:09 PM Thread Starter
mvp
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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?
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post #2 of 3 Old 02-27-2011, 11:07 PM
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Originally Posted by mvp View Post
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.

The most important medication in your fish medicine cabinet is.. Clean water.
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post #3 of 3 Old 03-19-2011, 02:46 PM
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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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