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#1
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![]() Where do you get par meters, and how much do they cost?
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#2
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![]() 16" tall water column with 9" between water and light gives you 25" to the sand bed. I ran my lights 15" above my 24" tall tank with great success (39" above sand bed). If you raise the light up a bit, you can continue with your current brightness and get better coverage. I would likely start by raising it about 5".
If you decide to turn the lights down a bit, I would say cut all colors equally. Your LED lit tank will look about 30% duller than your T5 tank. Every time I look at my tank now (with T5) it's like a glowing kick in the face compared to what it was with LED. |
#3
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![]() Was that at 100%? 39" seems really high.
Last edited by Slyguy00; 10-25-2013 at 04:31 AM. |
#4
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![]() Those had 80 degree frosted optics and were run at 80% on the white and 100% on the blue. Having no optics will make our heights different, but raising the fixture itself is a tool to improve coverage and lower the brightness at the same time. If your coverage is good, drop the brightness.
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#5
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![]() Is there an average height people run their lights above the sand bed? I just hung my maxspect razor yesterday and am not sure if I should keep it at the same height as the legs (like 8") or move it up more.
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#6
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![]() Quote:
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Hey! I never "LEFT" the hobby, just doing fresh water now. Which is still listed as part of Canreef if I'm not mistaken. ![]() |
#7
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![]() I think there are so many misconceptions around LEDs even after several years of use and a more mainstream acceptance. You could happily grow corals under nothing but white LEDs. The coral would get enough light for photosynthesis and grow but the colours would not look pleasing to our eyes. You could also probably grow corals under nothing but blue LEDs but, again, the colour would likely not be what we want for our own enjoyment.
All the other colours of LEDs being added to fixtures; green, red, violet; are not necessary for growth or coral health but are useful to fine tune the "look" of the corals for us. As for the topic of this thread, bleaching does indicate too much light. Blue is high in PAR in the spectrum that corals utilize so turning them down or raising your fixture will help. And you need to give the corals time to acclimate to the new light intensity. They won't change overnight. IME, it's better to start LEDs higher or at lower power and have your corals start to brown a bit, then turn them up or lower them than it is to shock them with too much light and bleach and potentially kill them. |
#8
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![]() Quote:
The lights are definitely duller than when I ran T5's. I'll try turning the light down as opposed to moving the lights up, as it would illuminate the room a little too much. I'll give it two weeks - if nothing happens, I'll move them up as recommend. I appreciate everyone's input! And monocus, I'll need to finally put you up on that offer for the PAR meter. |
#9
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#10
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May be low, but the whites don't really make the colors pop as well as I like. I've got a lot of green coral. ![]() As far as I know, whites don't do much for coral growth, hence why I've cut them out. |
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