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How far are your halides from the water????

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  • How far are your halides from the water????

    I'm wanting to put my halides closer to the water! Right now there about fourteen inches off of the water. And the tank is twenty four inches deep! Thinking i might get a little better growth if i move them closer! What do you guys think? How far do all of you with halides keep them?

  • #2
    I have a 60 gallon cube that is 24" deep. I use a 250W DE HQI at 7" above the water.
    But I think I may have to raise it up a bit, It looks like my leather is trying to lean away from it.
    Last edited by ama168; 11-25-2014, 07:21 PM.
    Bill

    "consider these truths humans only love what they know and people do not destroy what they love." Robert M. Fenner

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    • #3
      250 w 12 inches above surface for my 60 cube

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      • #4
        About 16 inches off my 24 inch deep tank Bill

        Corey

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        • #5
          400w MH here and they are 7" off water
          http://www.rowelab.com/AquaControlle...ylivin_sig.png
          https://cdn.shopify.com/s/files/1/09...70776651944918

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          • #6
            My 400s were always 8-10" above my 26" tank. It really depends on your reflectors what you can get away with.

            Worried about heat, splash, space in the hood?

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            • #7
              None of that. Just trying to maximize growth. I figured if they were closer the par would be greater and would get more growth.

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              • #8
                that or you would cook them easier.

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                • #9
                  8"-16" is probably ideal for most tanks. It does depend on a few things. For example if running two metal halides on a 6 foot tank you may want them higher for good coverage and use higher wattage bulbs. On a four foot tank closer to water, lower wattage could be ideal.

                  Size and quality of the reflector, color and wattage of the bulb can influence your location.

                  Lowering your reflector can help give more PAR but you may sacrifice spread if to low. On the other hand if you have them to high the spread maybe to much causing light loss in the canopy or outside of the tank if you don't have a canopy.

                  I like them closer to the water giving super high light areas and a narrow spread so I have lower light areas for less needy coral. I have spots in the tank with PAR as low as 50 and as high as 1200.

                  Couple of questions for you
                  What size tank?
                  How many Metal Halides?
                  What is the wattage?
                  What is the Kelvin?
                  Any supplemental lighting?
                  What is the model of your reflectors?
                  What kind of coral do you keep?
                  http://www.rowelab.com/AquaControlle...ylivin_sig.png
                  https://cdn.shopify.com/s/files/1/09...70776651944918

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                  • #10
                    That ⬆️⬆️⬆️⬆️⬆️ Is why I have mine a little higher off the water. I run a single 250 watt radium in a lumenarc reflector on my 48/48 cube. 1 bulb, full coverage. Corners are a little dimmer but it's a softy lps tank anyway

                    Corey

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