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    Thread: What lighting is required for winter indoor koi pond?

    1. #1
      whittlewormer is offline Junior Member
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      What lighting is required for winter indoor koi pond?

      Hello everyone, I have an indoor pond setup that I'm housing my adolescent koi in during the winter. This is my first time doing this and wanted to make sure that the lighting I'm using is sufficient or to find out what I should be using. I currently have just a standard florescent tube overhang light over the pond. The light is set on a timer for roughly 9 hours every day. Its not a huge light but it brightens the room for sure. I know the koi are used to the sun for light and I would guess they benefit from it's spectrum just like we do but I don't really know that and that's why I'm asking! Haha So my question is whether the light I'm using is sufficient and if not, what should I be using and how many hours per day should the light be on? Any help would be greatly appreciated, thanks!

    2. #2
      *Ci*'s Avatar
      *Ci* is offline Senior Member ~~ Moderator
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      Plants and tropical fish do fine with fluorescent lighting - a full spectrum, 6500k bulb would be the best. 9 hrs seems good to me as well.
      Is the pond planted? Any ambient window light? Pictures of your setup?
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      Ci


    3. #3
      whittlewormer is offline Junior Member
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      Thank you for the response and sorry for the delayed answer. Here are some pictures of my setup. I actually have two set ups going, one for the adolescent koi fish and one for my smaller koi that hatched later in the season. Its the larger setup that I'm more concerned with the lighting setup and whether the over hang light is sufficient. The larger setup isn't planted but the smaller one is but that setup is doing very well with the plants but it also has a better/closer light. The only ambient light is a small basement window that lets a small amount of light in enough to keep the basement from being completely dark.
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    4. #4
      *Ci*'s Avatar
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      I don’t think Koi need a lot more light, per se, just enough to keep their natural circadian rhythms going over the winter. Their colours may fade but will probably return again when they go back outside. If they were indoors all year I might try and improve the lights with,maybe, a full spectrum LED fixture with ramping up and down like I keep on my aquariums, but for your purposes, I would leave things as they are. Others may, hopefully chime in with more opinions or experience.
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      Ci


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