Metal Halide

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dat673

Feeder Fish
MFK Member
Sep 29, 2009
231
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Washington, DC
I have a 400w metal halide fixture on a 75 gallon tank that's 21" deep. How high should the fixture be above the tank? I have heard they produce alot of heat, so i'm trying to keep as much heat away from tank.

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Depends if you are trying to keep corals or not. Its all about PAR reading. Are you trying to keep coral?

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Yes I am trying to keep corals. O have mushroom and some palys right now that are under a 108w t-5 light. Looking to add an anenome, or something for a maroon clown to host in . I can look into other corals since i'll be having a lot more light for certain corals.

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dat673 said:
Yes I am trying to keep corals. O have mushroom and some palys right now that are under a 108w t-5 light. Looking to add an anenome, or something for a maroon clown to host in . I can look into other corals since i'll be having a lot more light for certain corals.

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I have a 108 watt T5 light also, how many bulbs and what kind of bulbs are they?


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400 W is overkill IMO. Not only is it gonna heat up your water your electric bill is going to go through the roof. You'll save a lot of money getting LEDs or just getting a 250W. What were you planning on keeping?
 
It was a fixture I git of cl for $80. I may just run the 250w only. wasn't sure if I should run both or just one. I always seen that some corals need more light. I only had fowlr tanks with mushrooms and a kenya tree. It's under t-5 but only 108w. I'll see in the future about an led fixture. I may have to catch another deal on cl.

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dat673 said:
It was a fixture I git of cl for $80. I may just run the 250w only. wasn't sure if I should run both or just one. I always seen that some corals need more light. I only had fowlr tanks with mushrooms and a kenya tree. It's under t-5 but only 108w. I'll see in the future about an led fixture. I may have to catch another deal on cl.

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If you're just gonna have mushrooms and the kenya tree then I'd def get another fixture. You got the fixture for cheap at $80 but your electricity bills will negate that after a few months
 
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