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Cultivated Reef

Lights out- White corals


LilCope

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When the lights go totally out and i look at the corals, they are generally white. It seems to only be white on the faces of the coral that receive light. Is this bleaching? or is this normal?

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Mr. Microscope

:welcome: to Nano-Reef.

 

Sounds like bleaching, but hard to say without knowing more about what's going on in your system and a pic or two. Have you recently changed lighting (what kind of lighting)? Are the corals new? How old is your tank?

 

Nice pic in your avatar BTW. Are you also a microscopist?

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The corals were bought from a guy who had them under t5 (not HO that i could notice). blue and purple bulbs. they're now under leds. i try to keep the intensity down near 30-40% white 50-60% blue (reef radiance). under light, they look okay... always thought they looked better under the t5. corals are relativity new (1-3months). ill post a pic when the lights go out.

as for the avatar- i work at the university of connecticut here at avery point in the marine science department ;) so i have my fair share of analyzing maaaaaany things. This was one of my favorites ( the pic was much larger but had to cut size to fit requirements).

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I keep mine under led lights also. I noticed that if I look top down the corls all have much more color to them rather than looking from a low angle. It is due to the shadowing from led's I believe.

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  • 2 weeks later...
The corals were bought from a guy who had them under t5 (not HO that i could notice). blue and purple bulbs. they're now under leds. i try to keep the intensity down near 30-40% white 50-60% blue (reef radiance). under light, they look okay... always thought they looked better under the t5. corals are relativity new (1-3months). ill post a pic when the lights go out.

as for the avatar- i work at the university of connecticut here at avery point in the marine science department ;) so i have my fair share of analyzing maaaaaany things. This was one of my favorites ( the pic was much larger but had to cut size to fit requirements).

 

I also use a reef radiance light. I've noticed with this fixture you have to make sure you have a smooth transfer when corals are new to LEDs. If I get a single coral. I just put them in a shady spot and move them out into stronger/appropriate light over the course of a week or two.

 

If I get many corals, I turn my timers down to run the lights for five hours a day, then after a week add an hour every few days.

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