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Old 03-31-2015, 04:48 AM   #1
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Can I use Reef lights on freshwater tank?

I have 2 fluval reef leds on a tank I'm breaking down and instead of selling them and buying new lights I'm curious if I can just use them on the freshwater tanks I'm going to set up.

The freshwater tanks will be for breeding guppies and plecos. I'm not gonna do any plants, just bare bottom tanks.

Is it ok to use these lights or are they going to be too bright for freshwater fish?


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Old 03-31-2015, 05:05 AM   #2
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Not sure on those lights.

I use box LEDs which it turns out were more like reef lights. I've turned off the blues and just run the white lights. Plants do ok'ish.

First time on a bn catfish swam out from shade and you could almost see the 'holy cow, get the shades' before he scuttled back under cover. Now they are used to it.
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Old 03-31-2015, 07:17 AM   #3
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Can I use Reef lights on freshwater tank?

If depends on how bright it is. I would think real, good, reef lighting would be way more powerful than needed for a freshwater unless it was like heavily planted.


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Old 03-31-2015, 09:10 AM   #4
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That's a good point. My lights need to shine through a Perspex cover and then the tank is 2 and half feet high so even blue light gets reduced somewhat.
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Old 03-31-2015, 10:11 AM   #5
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Quote:
Originally Posted by Delapool View Post
That's a good point. My lights need to shine through a Perspex cover and then the tank is 2 and half feet high so even blue light gets reduced somewhat.

Well quite a few tanks are not that tall :p therefore an increase in the amount of light the tank receives.


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Old 03-31-2015, 04:06 PM   #6
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if they are super bright maybe add some kind of a dimmer switch
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Old 03-31-2015, 04:32 PM   #7
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I think you would be better off getting a plant light because corals focus more on the blues and whites where plants like reds and greens.. Different light spectrum. I may be wrong I don't do planted aquariums so I would look into it


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Old 04-02-2015, 10:32 AM   #8
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Thought these links may be useful. This first is just info on lighting and plant preference. The second is more fun if you have any info or can make a guess on your reef lights. Basically you can use the link to re-build your light as a DIY and see how the lighting turns out by depth.

Lighting Spectrum and Photosythesis - Lighting - Aquatic Plant Central

Custom LED Strip - BML Custom
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Old 04-02-2015, 10:46 AM   #9
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considering you said bare bottom, no plants, than yes they will work, you just need to adjust the brightness or use screen covers to cut down on the brightness.


if you want live plants than no, the spectrum is all wrong for the most part.
plants want light in the 6500k-8000k temp/color, corals prefer 10,000k-16,000k for the white light and way down into near UV for the blue end.
Totally wrong for freshwater plants.
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