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Poll... Photo Period Change

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  • Poll... Photo Period Change

    I've been slowly reducing my photo period over the last couple months. I've always used what most would consider a long period for my MH. Somewhere around 12 hours per day. I'm down to about 8 hours per day over most tanks and out of the 7 MH I'm running only 2 have supplemental VHO. So for most of mine it's MH or nothing. I see a slight difference in color (darker but not brown) but none in growth since the reduction. My reasoning was simple economics and trying to reduce power consumption before the chiller season kicks in.

    Pick one out of the first six choices.
    Pick one of the last two if it applies.

    SteveU
    18
    Use ZEOvit... Yes, shorter
    38.89%
    7
    Use ZEOvit... Yes, longer
    0.00%
    0
    Use ZEOvit... No, same
    44.44%
    8
    Not using ZEOvit... Yes, shorter
    0.00%
    0
    Not using ZEOvit... Yes, longer
    0.00%
    0
    Not using ZEOvit... No, same
    5.56%
    1
    I reduced the photo period and everything seems the same.
    5.56%
    1
    I reduced the photo period and like the change.
    5.56%
    1
    Last edited by GTR; 04-20-2005, 01:43 PM.
    “People are very open-minded about new things - as long as they're exactly like the old ones.”
    ...Charles F. Kettering

  • #2
    Steve, run actinics with your MH's[no matter what K] for tissue chromatophore exctitation & florescence[read: color]. I'm currently running my MH's between 9-10 hrs/day & VHO actinics 12hrs. Bob
    "There might be something to this ZEOvit"

    Comment


    • #3
      Bob... I'm not sure if the VHO (actinic) really changes the color of the coral or just our perception of that color. Most of my MH only are 14K which to me look real blue. I'm not a fan of high K bulbs but without supplemental light I guess it's ok.

      SteveU
      “People are very open-minded about new things - as long as they're exactly like the old ones.”
      ...Charles F. Kettering

      Comment


      • #4
        Also... I might add that I think ZEOvit may allow us a shorter photo period and hince may be a benefit not mentioned in the past. Water clearity may be coming into play here as well.

        SteveU
        “People are very open-minded about new things - as long as they're exactly like the old ones.”
        ...Charles F. Kettering

        Comment


        • #5
          9 hrs 400 watt MH's and 12 hrs vho with t5....

          Comment


          • #6
            I have stayed the same

            MH-10 Hours a day
            10K VHO's-10.5 Hours a day
            Actinic VHO's-11 Hours a day
            You're Norma Desmond you used to be big.

            I am big it's the pictures that got small.

            From the classic movie "Sunset Boulevard"

            Comment


            • #7
              Steve, I run my MH bulbs 7 hours (3 x 250W – 10.000K) and my T5 blue tubes (4 x 80 W) 12 hours. I have reduced the MH lighting period about 3 years ago coming down from 9 hours. I have not noticed any positive or negative effect. OK positive was the reduction of the electricity bill

              IMO the length of the lighting period also depends to the strength of the bulbs and the bulbs kelvin, also the place where the corals are hosted (directly under the bulb or outside).

              G.Alexander

              Comment


              • #8
                I reduced my 150w de's from 10hrs a day to 6hrs a day and know my corals are still coloring up--go figure, a lot of wasted money on electricity I run my t5's for 12 hrs
                Sean

                Tank Specs:60g Cube SPS/Clam tank, ASM G1x Skimmer, DIY ZEOvit Reactor, 1x400w EVC 14k, Marine Life Aquatics CR-250 CaRx (RIP)

                Not sure yet.....Build Thread to come!

                Comment

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