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Ron Reefman
Lets Go Snorkeling!
Reef Squad
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Reef Tank 365
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Tampa Bay Reef Keepers
MAC of SW Florida
I'm not saying you are wrong, just adding some clarification and explanation.
Deeper corals do rely more on blue spectrum than shallower corals, but that difference is almost insignificant in our aquariums. Your coral itself doesn't really care that much about light other than to create pigments to protect itself. The zooxanthellae that do photosynthesis inside the coral do care about the light a lot! And for all corals 420nm to 480nm and 640nm to 660nm are the spectrum most used for doing photosynthesis. This makes food for the coral which keeps it healthy and growing. But white light is made up of many colors. So there is blue and red spectrum in the white as well. Just because we see it as white doesn't mean the zooxanthellae does... they don't 'see' the light with our eyes. And finally, corals do 'change' the species of zooxanthellae they keep, so a deep water coral can adapt and take on zooxanthellae that use red light for photosynthesis.
So yes, blue is very important for the health of all photosynthetic corals. But I wouldn't say lps or deep water corals need more blue than shallow water corals or sps or zoas. They all use blue, the deep water corals are just used to having only blue.
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swissgaurd
Well-Known Member
Ron that is like the coolest thing ive seen does the birdsnest sway with the currents.how big is it nowI have 2 over my 180g tank. They have been running 24/7 for over 10 months now. It's going to take one heck of a great fixture to get me to change them.
And just in case you have any concerns about this fixtures ability to grow coral... Here is a pic of what was a less than 1" broken frag of birdsnest that had 3 extremely tiny growing 'bumps' at the good end and a fresh break at the other end. I tied and hung off the center brace in my 180g. That was in Dec 2012. This pic was 3 or 4 months ago and it was the size of a baseball. Today it is even bigger than a softball and has more than 100 growing tips! If you want to see it today, let me know and I'll take a new photo for you.
vic
