Are two Hydra 26HD lights enough for my tank?

Discussion in 'Aquarium Lighting By Dana Riddle' started by gtguy256, Feb 7, 2018.

  1. gtguy256

    gtguy256 Member

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    I have two hydra 26hd over my ~100gallon tank. Dimensions of 32 wide 24 deep 30 tall. I feel I'm struggling with getting the right intensity. Does anyone have any suggestions for settings or % of power to use over my size tank?
     
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  2. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter Reef Squad Leader R2R Excellence Award Photo of the Month Award Build Thread Contributor

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    Should be fine. How high above the tank are they?

    What do have for peak and what is the photoperiod?
     
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  3. Coastie Reefer

    Coastie Reefer Valuable Member Build Thread Contributor

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    I have 2 over a 40B, roughly 36x18x18 and I could probably catch my water on fire. I have them on a 1 hour ramp up and down maxing to about 40% blue 15% white and 5% red and green from 11am to 10pm. Honestly I struggle to find a good balance for a mixed reef.
     
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  4. Fudsey

    Fudsey Jack of all trades R2R Supporter R2R Excellence Award Reef Tank 365 Build Thread Contributor Partner Member 2018

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    I have 2 over my 90 and I do not have them maxed...

    settings12-7-17.jpg
     
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  5. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter Reef Squad Leader R2R Excellence Award Photo of the Month Award Build Thread Contributor

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    How high above the tank Coastie?


    For yourself and the OP, my preference has been to run a 6-8 hr peak. (Par is cumulative kinda , daily light integer ), so a higher par , run shorter , a lower par run longer.

    A longer run time with high par may, create photoinibitin and shut down the process. It may not bleach with higher nutints but it may not like it for growth.
     
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  6. Cherub

    Cherub Valuable Member R2R Supporter Build Thread Contributor Partner Member 2018

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    it should be just fine as they have a good spread
     
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  7. gtguy256

    gtguy256 Member

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    The lights are about 7" ABWL. ai settings.jpg
     
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  8. gtguy256

    gtguy256 Member

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    Peaks are in this screenshot ai peaks.jpg
     
  9. jsker

    jsker Reefing is all about the adventure Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Build Thread Contributor Partner Member 2018

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    Here is some setting to try link
     
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